David Grundman
Killed by karma/cactus in 1982
David decided to go out and shoot at Cacti in the desert with his roommate. He shot a small one in the trunk a few times and it fell to the ground, no problem.
Next, he went after a 100-year old, 26-footer. A 4-foot arm fell off the cactus after shooting it, and it landed right on top of him.