The moment just prior to having uncontrollable diarrhoea. A red light gives you approximately 10 seconds to make it to the bathroom before wherever you are becomes ground zero for a "pooclear" explosion.
I was on the train to work this morning when without warning I got a red light and some fucker was in the bathroom! I had no choice but to go in the sink!
To have explosive diarrhoea
I swear, I'm never eating Mexican food again! That taco caused a pooclear explosion so big they felt it in Australia!