http://www.darwinawards.com/darwin/darwin2006.html

Lots to read, but was Waterdog living in Brazil?

Hammer of Doom
2006 Darwin Award Nominee
Confirmed True by Darwin
(August 2006, Brazil) August brings us a winner from Brazil, who tried to disassemble a Rocket Propelled Grenade (RPG) by driving back and forth over it with a car. This technique was ineffective, so he escalated to pounding the RPG with a sledgehammer. The second try worked--in a sense. The explosion proved fatal to one man, six cars, and the repair shop wherein the efforts took place.
14 more RPG grenades were found in a car parked nearby. Police believe the ammunition was being scavenged to sell as scrap metal. If it wasn't scrap then, it certainly is now!