SigSys lab is about what you expect. People sitting, watching Diana lecture. Nothing special.
UNLESS.
Unless we take a page from the book of a wise man I know (who shall go unnamed to protect his identity, though I'll be happy to give him credit if he asks me). This man has developed a certain sort of game, specifically for boring class situations. He watches people's actions and tries to forget that he knows they're thinking people, thereby allowing himself to watch people's actions without anticipating possible motives. Essentially, he thinks of them as monkeys. Who doesn't think monkeys are funny? No one. It takes a decent amount of effort to break that association in your mind, but if you succeed the results can be hilarious. Try it!