diff --git a/start.sh b/start.sh
index 185666a..65c146e 100755
--- a/start.sh
+++ b/start.sh
@@ -175,22 +175,26 @@ weather() {
 mkdir -p "$BOTDIR/{irc,seen,karma}"
 cd "$BOTDIR"
 
+# Connect ii and join channel. Afterwards $IRCIN and $IRCOUT are
+# available
+
 echo "connecting."
 ii -i $BOTDIR/irc -s $SERVER -p $PORT -n $BOTNICK &
 PID=$!
 sleep 1
 echo "/join $CHANNEL" > $BOTDIR/irc/$SERVER/in
 sleep 1
-
 echo "ready."
 
+# Listen on $IRCOUT, parse input and call functions once something
+# of interest gets posted.
 tail -n 0 -f "$IRCOUT" \
     | while read -r line
 do
     NICK=$(echo "$line" \
                 | sed -n 's/^....-..-.. ..:.. <\([^>]*\).*/\1/p')
 
-    # prevent loops
+    # prevent loops; so the bot can't trigger itself.
     [ "$NICK" == "$BOTNICK" ] \
         && continue
 
@@ -198,10 +202,13 @@ do
                 | tr '[:upper:]' '[:lower:]' \
                 | sed -n 's|.*\(![a-z]*\).*|\1|p')
 
+    # intentionally limiting the argument to one and also limit the
+    # character set for safety reasons.
     ARG=$(echo "$line" \
                 | tr '[:upper:]' '[:lower:]' \
                 | sed -n 's|.*![a-z]* \([a-zA-Z0-9\-_+]*\).*|\1|p')
 
+    # We call it gummipunkte now.
     KARMA=$(echo "$line" \
                 | tr '[:upper:]' '[:lower:]' \
                 | sed -n 's|.* \([a-zA-Z0-9\-_]*[+-][+-]\).*|\1|p')
@@ -209,6 +216,7 @@ do
     echo "in> $line"
     echo "in> NICK=$NICK, COMMAND=$COMMAND, ARG=$ARG, KARMA=$KARMA"
 
+    # we just save the line and replay it on the !seen command
     [ ! -z "$NICK" ] \
         && echo "$line" > "$BOTDIR/seen/$NICK"
 
@@ -221,6 +229,7 @@ do
         "!settopic") settopic; ;;
         "!seen") seen $ARG; ;;
     esac
+
     case "$KARMA" in
         *[+-][+-]) karma $KARMA; ;;
     esac