false shart
When you fart so propulsively, you believe a trace of shit particles escaped into your trousers. The ensuing five minutes of mental deliberation of whether you have any fecal matter in your pants is like a five yard false start penalty for an offense in football.
After eating shrimp at the Chinese buffet, I farted outside the restaurant. I wasn't sure if I crapped my pants, and it took me a while before I realized I just called a false shart penalty on myself.