Not quite “heard over the cubicle wall”, but quite a hilarious series of emails—from the same guy—on Yahoo!’s internal stuff-for-sale email list:

16:09 – “FREE: Boxes” – “I have a ton (not literally) of boxes…”
17:17 – “REMOVED! — FREE: Boxes” — “I’m sorry this has been removed because my dog just peed on the boxes! I can’t believe it…”
17:40 – “FREE: Chocolate Lab Mix” – “She is a beautiful 2 year old chocolate labrador mix. She can catch frisbees in the Air. She is extremely gentle with children and is very very good with other animals…”

I’ll leave it up to the reader to determine why the dog is no longer wanted. :)