Overheard at the Office #12

A colleague tossed a Slurpee cup into the trash.  The next morning it was on his desk with a yellow sticky note stating "Please do not throw liquids in the trash. Building rules."  He then put another yellow sticky over it asking for a copy of these building rule, and then tossed it back into the trash (still containing a sizable amount of liquid).  It wasn't there the next morning. 

I would have probably just left a note to stop wasting my sticky notes.