I've got a lighthearted one for you. I was lead backseat PIC of an AH-64D during a night mission in Afghanistan 2010. We were about 4 hours in to a 7 hour recon / counter IED mission. We got a call from some ground forces asking if we could do a little recon near their position. We gave them the standard check in and they gave us their situation and location. We verified we had eyes on their location and would recon the area. They then gave us their grid and we again told them we had eyes on. They then asked if we wanted them to mark their location with IR buzz saw. My trail PIC decided they just weren't getting it so we should have some fun.
He asked if they had time for a 'sensor check'. I started yelling at my front seater to get his sensor on that vehicle, I knew what was about to happen. They abliged, so he said to start out with an IR buzz saw at the from of the Stryker troop carrying vehicle. The guy jumped on the front an started spinning the chem light. We asked if they would go to the right side to do the same. The ground guy asked if he should spin clockwise or counter clockwise. We were dying laughing. My trail PIC could barely keep from laughing, but he said to change directions and go clockwise now. The guy did it. We told him to do it on the left side, and he scurried across and started spinning it again. We then said for the final check he had to go to the rear of the vehicle and spin the buzz saw counter clockwise as fast as he can. He starts spinning it pretty hard but we tell him it needs to be faster. He starts whipping that thing as fast as humanly possible, almost falling off the Stryker. Without a bit of laughter in his voice my trail aircraft says that will conclude the test, nothing to report in the area, have a good night, and we fly away. When we got back we showed the video to the unit SP, who was crying he was laughing so hard. Once he caught his breathe he told is to never do that again.
If you didn't know, not only is this not a real check, but the AH-64D TADS sensor can't even detect IR chem lights.