Yeah, I had once done that to myself with the hacksaw, getting the blade on backwards. Although, I was still new. Even after I had topped out, I learned that you don't outgrow on the job pranks.
Last one for me was coming back from lunch and finding one of my fellow J-men had filled my toolbox full of polywater. I'm just glad I have a good sense of humor, 'cause that took a few days to clean up.