At the ADRL race in Georgia this last week end, one of the Pro Mod teams had one of the owners of the car killed while checking the preasure of a nitrous bottle. They said the bottle was heated in an approved bottle warmer, not sure what caused it to as they said "had rapid depreasuration" the bottle launched over 200 yards from their pits. There are some stories about it on several racing websites. Be careful with your bottles if you run nitrous.

wilmes and crew were there this weekend

Here is what was said about the accident by the coroners office.
At approximately 9 a.m. Saturday, Mike Walker was in the Pro Nitrous pit area. Canisters of nitrous oxide warmed in a warming container, the coroner said.
The warming container apparently worked fine, but something was wrong with the canister, Lipsey said.
At 9:04 a.m., the nozzle and gauges exploded from the top of the canister, the coroner said. The explosion made a terrific boom. The canister started up in the air, struck the side of a trailer before continuing up into the air. One piece struck Walker in the chest, leaving a gash. Walker was transported by ambulance to Memorial Hospital of Adel, where he was declared dead at 9:42 a.m. Saturday. Though it had rained Saturday morning, Lipsey said the motorsports park was still crowded but no one else was injured by the exploding debris.