Worst ever, i had a troop who said we couldn't prank him. He went over his vehicle like a bomb squad every day. One day I did a few obvious things to his truck, put a sign on it, put grease under the handle, but those were distractions. The real kicker was I had filled a condom with water, crawled under his truck, tied it to the bolts inside the bumper with fishing line so the first time he hit the brakes it would roll out and hang down from the back bumper.
We watched him do his inception, catch the distractions, and he drove up to us and told us we couldn't get him with a big grin. He accelerated and drove off with that big dong swinging away. A couple of us then sprinted to our vehicles and followed him around post. People were pointing and laughing, and we were just dying. Finally he saw us and figured out that he had been had. He pulled into the PX parking lot and did a walk around as we roared off.
Next day he wasn't so proud.