Similar to my Movies, but Muppets post, this one came from listening to podcasts at work.
This one is simplistic, but potentially hilarious. You simply pick any moment from history (real or fictional) and put a whoopie cushion on the chair of someone for MAXIMUM FART EFFECT. You can go into detail of how you think the scene will play out after the whoopie cushion is sat on, but its not required.
That's it.
I'll start with putting the cushion under Genghis Khan at one of his war meetings.