diff --git a/Cargo.lock b/Cargo.lock
index 9716d17..e5487b7 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1420,7 +1420,7 @@ dependencies = [
  "security-framework",
  "security-framework-sys",
  "webpki-root-certs",
- "windows-sys 0.52.0",
+ "windows-sys 0.61.2",
 ]
 
 [[package]]
diff --git a/src/dice.rs b/src/dice.rs
index 169ea03..fc33011 100644
--- a/src/dice.rs
+++ b/src/dice.rs
@@ -1,4 +1,6 @@
-use crate::limits::{MAX_DICE_COUNT_PER_ROLL, MAX_DISPLAYED_DICE_PER_MESSAGE, RESULT_CULL_CHARACTER_THRESHOLD};
+use crate::limits::{
+    MAX_DICE_COUNT_PER_ROLL, MAX_DISPLAYED_DICE_PER_MESSAGE, RESULT_CULL_CHARACTER_THRESHOLD,
+};
 use anyhow::bail;
 use rand::{Rng, RngExt};
 use std::convert::Infallible;
@@ -116,10 +118,10 @@ impl Expression {
                 // Exploding dice are early, they add rolls
                 if let Some(fragments) = x {
                     write!(w, "x")?;
-                    let mut comparers = Vec::with_capacity(fragments.len());
-                    for fragment in fragments {
-                        comparers.push(fragment.comparer(rng, w)?);
-                    }
+                    let comparers = fragments
+                        .iter()
+                        .map(|fragment| fragment.comparer(rng, w))
+                        .collect::<Result<Vec<_>, _>>()?;
                     let mut i = 0;
                     while i < rolls.len() {
                         if i > MAX_DICE_COUNT_PER_ROLL {
@@ -131,12 +133,8 @@ impl Expression {
                                 rolls.push(rng.random_range(1..=size));
                             }
                         } else {
-                            // Explode based on comparers provided
-                            for comparer in comparers.iter() {
-                                if comparer(rolls[i] as f64) {
-                                    rolls.push(rng.random_range(1..=size));
-                                    break;
-                                }
+                            if comparers.iter().any(|comparer| comparer(rolls[i] as f64)) {
+                                rolls.push(rng.random_range(1..=size));
                             }
                         }
                         i += 1;
@@ -454,12 +452,15 @@ pub(crate) enum DiscordMdWitnessError {
 }
 
 impl DiscordMd {
-    pub(crate) fn create_witness(md: &Arc<RwLock<Self>>) -> DiscordMdWitness {
-        let mut parent = md.write().unwrap();
-        parent.buffers.push(String::new());
+    pub(crate) fn create_witness(md: Arc<RwLock<Self>>) -> DiscordMdWitness {
+        let buffer_idx = {
+            let mut md = md.write().unwrap();
+            md.buffers.push(String::new());
+            md.buffers.len() - 1
+        };
         DiscordMdWitness {
-            parent: md.clone(),
-            buffer_idx: parent.buffers.len() - 1,
+            parent: md,
+            buffer_idx,
             result: None,
         }
     }
@@ -469,7 +470,6 @@ impl DiscordMd {
     }
 }
 
-
 impl DiscordMdWitness {
     pub(crate) fn end(self) {
         let mut parent = self.parent.write().unwrap();
@@ -479,8 +479,7 @@ impl DiscordMdWitness {
                 .map(|result| format!("**{result} = …**"))
                 .unwrap_or_else(|| String::new());
         } else if let Some(result) = self.result {
-            parent.buffers[self.buffer_idx]
-                .insert_str(0, &format!("**{result}** = "));
+            parent.buffers[self.buffer_idx].insert_str(0, &format!("**{result}** = "));
         }
     }
 }
@@ -510,7 +509,6 @@ impl Witness for DiscordMdWitness {
     }
 }
 
-
 impl<'a> WitnessSet for DiscordMdWitnessSet<'a> {
     type Ok = ();
     type Error = DiscordMdWitnessError;
@@ -519,10 +517,7 @@ impl<'a> WitnessSet for DiscordMdWitnessSet<'a> {
         let mut parent = self.witness.parent.write().unwrap();
         if parent.dice_written >= MAX_DISPLAYED_DICE_PER_MESSAGE {
             if !self.dice_elided {
-                write!(
-                    parent.buffers[self.witness.buffer_idx],
-                    "…"
-                )?;
+                write!(parent.buffers[self.witness.buffer_idx], "…")?;
                 self.dice_elided = true;
             }
             return Ok(());
diff --git a/src/main.rs b/src/main.rs
index 742b301..78308c0 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -137,8 +137,7 @@ pub async fn roll(ctx: &Context, command: &CommandInteraction) -> anyhow::Result
                 }
             })
             .unwrap_or(1)
-            .min(MAX_ROLL_REPEATS as i64)
-            .max(1) as usize;
+            .clamp(1, MAX_ROLL_REPEATS as i64) as usize;
         let private = options
             .iter()
             .find(|option| option.name == "private")
@@ -170,7 +169,8 @@ pub async fn roll(ctx: &Context, command: &CommandInteraction) -> anyhow::Result
                     None
                 }
             })
-            .and_then(|s| s.parse::<u64>().ok());
+            .map(|s| s.parse::<u64>().context("Seed could not be parsed. Make sure it is a 64 bit integer between 0 and 2^64-1."))
+            .transpose()?;
 
         let expression = parsing::parse(&formula).context("Dice formula could not be parsed.")?;
 
@@ -193,13 +193,13 @@ pub async fn roll(ctx: &Context, command: &CommandInteraction) -> anyhow::Result
 
         let surrounding_par_count = pre_paragraphs.len() + post_paragraphs.len();
 
-        let paragraphs = if repeat <= 40 - surrounding_par_count {
+        let roll_paragraphs = if repeat <= 40 - surrounding_par_count {
             let discord_md = Arc::new(std::sync::RwLock::new(DiscordMd {
                 buffers: Vec::with_capacity(repeat),
                 dice_written: 0,
             }));
             for _ in 0..repeat {
-                let mut witness = DiscordMd::create_witness(&discord_md);
+                let mut witness = DiscordMd::create_witness(discord_md.clone());
                 let result = expression.evaluate(&mut rng, &mut witness, i64::MAX)?;
                 witness.witness_total_result(result)?;
                 witness.end();
@@ -208,7 +208,7 @@ pub async fn roll(ctx: &Context, command: &CommandInteraction) -> anyhow::Result
 
             discord_md.buffers
         } else {
-            let mut par = String::new();
+            let mut par = String::with_capacity(8 * repeat);
             for i in 0..repeat {
                 if i > 0 {
                     write!(par, ", ")?;
@@ -222,9 +222,11 @@ pub async fn roll(ctx: &Context, command: &CommandInteraction) -> anyhow::Result
             vec![par]
         };
 
-        pre_paragraphs.extend(paragraphs);
-        pre_paragraphs.extend(post_paragraphs);
-        let paragraphs = pre_paragraphs;
+        let paragraphs = {
+            pre_paragraphs.extend(roll_paragraphs);
+            pre_paragraphs.extend(post_paragraphs);
+            pre_paragraphs
+        };
 
         if paragraphs.iter().map(|s| s.chars().count()).sum::<usize>() > 4000
             || paragraphs.len() > 40