Since what happened is so obvious to everyone, clearly I don't understand how Dragon Ball works. The dud mine was behind a worm. Shouldn't the worm be hit? I mean, if I stand right next to a worm and use Fire Punch or Prod, the worm gets hit every time. Sometimes I've had whiffs with Baseball Bat, but they're usually from standing IN a worm, not next to it.
EDIT: Ok, I'm a god damn idiot. I always knew I was. The player was indeed standing IN the near worm, not next to it. Feel free to send me back to Worm Nursery School.