Don't know if this counts.
My son is 14 months old and has gone in the potty a handful of times (more like we know he's going to go and we put him there, and he goes).
Anyway, a while back we were in the living room and he starts looking uncomfortable so I took him to the bathroom and put him on the toilet. There he is, sitting and straining and nothing is happening, so after a while he gives up and I give up and take him off the toilet. I turn to get something from the cabinet, and as I do, he makes a massive diarrhea-style poop on the bathroom rug, does a little dance in it, and RUNS DOWN THE WHITE-CARPETTED HALLWAY, placing little poop-footprints all the way into the bedroom.
After the cleaning was over, and the horror began to fade, those poop-prints started to look almost cute. Yes, they stained. The steam cleaner has made them almost invisible now, and I'm sure they'll be totally invisible after the next time we steam the carpet.
Oh, and my daughter once peed in her bed, then came crawling into ours and we didn't realize she had peed until she wiggled her way between DH and I and got us all wet with pee...eeeew.
She also once peed in the bedroom because she took DH literally when he said "stay in there until you're done putting the books away," and didn't come out when she needed to pee. He said that he saw her come to the door, stand there for a couple of seconds, and turn around a couple of times, and he just figures she thought it better to obey than to tell him she needed to pee. She has always been a very obedient child, even though we don't discipline her harshly at all, and the incident taught DH to be more careful with how strongly he phrases things to her.
Mama, homeschooler, midwife. DD (13yo), DS (11yo), DD (8yo), DD (3yo), somebody new coming in November 2013.