April 5, 2012 10:00 AM EDT
SOOOOO, I was at the St. Louis Zoo on Monday and I saw this sign:
Which was, by the way, posted on the habitats for the larger apes. I was like, HMMMMMMMM. Scared but yet intrigued. The next pic shows where the door was. Now this is on the orangutan and the gorilla enclosures only. :P