Hopefully, you don't act like these people when you eat at restaurants, and your waiter does not, in fact, hate you—unfortunately, as anyone who has waited tables knows, a shocking percentage of humanity is like this. Don't do these things. Order when you're ready to order. Order things the restaurant sells. Don't be a lunatic. It's actually not very hard. Nevertheless:

This video comes from The Mutiny, a sketch group from the iOWest comedy theater in Los Angeles. Their waiters don't hate them (because they're comedians, and thus, probably also waiters).

Sources: The Mutiny