Hmm. On the first day working at a bar, I am walking in, and something goes flying past my head. As I am trying to figure out what it was, the day bartender begins to scream, “Greg, no fucking way! Not again, I am not even finding it this time!” What the fuck is it? Turns out there is a day regular that, when he feels he is not getting enough attention, whips out his glass eyeball and hucks it at the bartender.
-Greg
Break Room Stories 
Should have seen that coming! ;P
Eww.
Bartenders always have the best stories!