My office is just around the corner from a classroom. Herpetology is currently being taught there now. The other day my friend and I were talking in my office, and the herpetology TA was out in the hall making noise while she was doing something.
Me: What is she doing out there?
Friend: It looks like she's playing around with a bunch of snakes in the hallway.
Me (doing my best Samuel L. Jackson impersonation): I HAVE HAD IT WITH THESE MOTHER FUCKING SNAKES IN THIS MOTHER FUCKING HALLWAY!!!
Unbeknownst to me, class was in session.
And they were taking a test.
Yes, they all heard.