True story: At the start of my IFR check ride, just as we're crossing the departure threshold on climbout, a bumblebee pops out from under the glareshield and starts buzzing around my DPE. He COMPLETELY FREAKS. Starts screaming and swinging away at the bee with his paperwork. Yells at me to declare an emergency because he's allergic, and to get back down on the ground NOW! NOW! NOW!! I concentrate on flying the plane and start making the pattern to land (I'm not going to declare; it's an untowered field and ATC's not going to be able to do anything for me), all the while with the DPE flailing and yelling next to me.
He finally gets a good enough whack on the bee to knock it onto the floor, where he proceeds to Fred Flintstone it to death. I swear I thought the dude was going to bang a hole through the floorboard with his foot!
The rest of the check ride was pretty uneventful, after that....