Not really bad so much as spiteful, but when I was in college and would go to my parents' house for summer, my dad took great pleasure in 'delegating' his lawnmowing chores to me. I of course, didn't want anything to do with it since it was my summer break and all that jazz, so I devised a plan to hopefully get out of it. The first time I mowed, I made sure that the mower was low enough that when I mowed over his inground sprinkler system I 'accidentally' hit a few of the sprinkler heads. After much cussing on his part, hours of repair work, and many denials that I did it intentionally, my mission was accomplished.