Been watching The View in the exercise room lately...
1. Whoopi Goldberg, without prompting, suddenly talks about Starcraft and how much fun it is to play. Then she tells the audience that they will each receive a free copy at the end of the show. The audience doesn't care.
2. One episode had Paul McCartney as a guest who got the audience to sing one of his songs a long with him. It would be funny if the song he picked was so obscure that nobody knew it and couldn't sustain it when he stopped singing with them to play his kazoo.
3. Halfway through the commercials there's usually a cut to one of the hosts with someone from the audience who says their name, where they're from, and who the guest will be after the next half of comercials. It would be funny if, after saying this, the camera pulls out so you see that there is a second host on the other side of the woman. Both of the hosts then start aggressively tickling the person who then falls to the ground laughing, then tells them to stop, then says she's feeling sick, and then thows up. The whole scene lasts for a full minute. (Pete is credited with this idea).