Assplosions have been known to inexplicably end up on the underside of the toilet seat.
In ancient China, those capable of the assplosion were looked upon with the highest regard.
see also BM Blowout
2) I was sitting in a stall when someone next to me assploded. The stench was so foul and the sound so wretched, I decided to just wipe later and get the heck out of there!