diff --git a/opt/cs50/bin/http-server b/opt/cs50/bin/http-server
index 8515dd7..b1314a8 100755
--- a/opt/cs50/bin/http-server
+++ b/opt/cs50/bin/http-server
@@ -15,7 +15,7 @@ normal=$(tput sgr0)
 
 # Check for app.py or wsgi.py
 if [[ -f app.py ]] || [[ -f wsgi.py ]]; then
-    read -p "Are you sure you want to run ${bold}http-server${normal} and not ${bold}flask${normal}? [y/N] " -r
+    read -p "Quack. Are you sure you want to run ${bold}http-server${normal} and not ${bold}flask${normal}? [y/N] " -r
     if [[ ! "${REPLY,,}" =~ ^y|yes$ ]]; then
         exit 1
     fi
diff --git a/opt/cs50/bin/sqlite3 b/opt/cs50/bin/sqlite3
index 3c1c0e7..b0eddfa 100755
--- a/opt/cs50/bin/sqlite3
+++ b/opt/cs50/bin/sqlite3
@@ -12,7 +12,7 @@ fi
 
 # If no command-line argument
 if [[ $# -eq 0 ]]; then
-    read -p "Are you sure you want to run ${bold}sqlite3${normal} without a command-line argument (e.g., the filename of a database)? [y/N] " -r
+    read -p "Quack. Are you sure you want to run ${bold}sqlite3${normal} without a command-line argument (e.g., the filename of a database)? [y/N] " -r
     if [[ ! "${REPLY,,}" =~ ^y|yes$ ]]; then
         exit 1
     fi
@@ -21,12 +21,12 @@ if [[ $# -eq 0 ]]; then
 elif [[ $# -eq 1 ]] && [[ ! "$1" =~ ^- ]]; then
     if [[ ! -f "$1" ]]; then
         if [[ ! "$1" =~ \.db$ ]]; then
-            read -p "Are you sure you want to create ${bold}$1${normal}? SQLite filenames usually end in ${bold}.db${normal}. [y/N] " -r
+            read -p "Quack. Are you sure you want to create ${bold}$1${normal}? SQLite filenames usually end in ${bold}.db${normal}. [y/N] " -r
             if [[ ! "${REPLY,,}" =~ ^y|yes$ ]]; then
                 exit 1
             fi
         else
-            read -p "Are you sure you want to create ${bold}$1${normal}? [y/N] " -r
+            read -p "Quack. Are you sure you want to create ${bold}$1${normal}? [y/N] " -r
             if [[ ! "${REPLY,,}" =~ ^y|yes$ ]]; then
                 exit 1
             fi
diff --git a/opt/cs50/bin/valgrind b/opt/cs50/bin/valgrind
index 9536c2e..45f054c 100755
--- a/opt/cs50/bin/valgrind
+++ b/opt/cs50/bin/valgrind
@@ -3,7 +3,7 @@
 # Don't run on Python programs
 for arg; do
     if echo "$arg" | grep -Eq "(^python|\.py$)"; then
-        echo "Afraid valgrind does not support Python programs!"
+        echo "Quack. Afraid valgrind does not support Python programs!"
         exit 1
     fi
 done