Following through, mainly
Three things immediately spring to mind...

1. The time when, as a kid, I was desperate for the loo and, as I ran up the stairs to the bathroom I farted and a big poo fell down my leg and bounced off my foot.

2. The time, again as a kid, when I was having a bath, farted (again), and spectacularly followed through, resulting in the bathwater looking like Bisto. I leapt out of the water, pulled the plug out, and had to squash the poo down the plughole before my parents found out what had happened.

3. Talking of parents, the time when I went into the bathroom in their house when I still lived there, and saw a smudge of poo on the edge of the sink. I shudder to think how it got there.
(nasalhair The Twix guy!, Fri 28 Mar 2008, 15:21, 2 replies)

I love this.
I'm sure I would've shat myself laughing if I could actually shit (four days of hardly eating has led to four days of not pooing at all).
(non_the_road, Fri 28 Mar 2008, 17:47, closed)

when i pissed in a sink at college
the sin k smelled of piss for weeks. (may have needed to drink more water...) anyway, did you bath smell of poo? be honest
(magictorch, Wed 2 Apr 2008, 13:34, closed)