What was the point of Twitch?
The character of Twitch was significantly introduced in the second act and given an interesting backstory, but then the script did absolutely nothing with him. At first I thought he was going to serve the purpose of helping Stanley steal Mr. Sir's truck so he could go look for Zero, which would have been a nice payoff for the character, but apparently Mr. Sir left the keys in the ignition, and Stanley was able to steal it without any difficulty (well, apart from driving it into a giant hole).
Did Twitch play a larger role in the book? Or was there a cut scene that otherwise justified introducing a new character so late in the movie? Because as it stands, he's entirely superfluous to the story.