I worked for davey tree for 7 years , we were an awnry bunch . We used to tie off clibers lines , tie funky knots on their saws , Some trucks windshield wipers didnt work , we covered the winshield in clay mud on a co workers rig . Stuffed roadkill inside chippers and let it back over the weekend . Make green guys use hand saws to cut up brush . Put a open can of oysters inside a coworkers rig rigt behind where the stereo would go . Dig ****ie traps so coworkers trucks would get stuck in the ROW. And my personal favorite , My Last day working for Davey I found a nice fat dead racoon , at the end of the day a coworker pulls in the yard with his bucket truck , I wait until nobody was looking and I set the coon on top of the turbo ,they spent a week cleaning the mess and trying to get rid of the smell after it exploded over the weekend . Another good one is grease on hard hat liners ,door handles and windows . Pranks are fun as long as they are not too extreme