a friend of mine had a fitting leak on propane heater after changing out tanks and it exploded on him. he is in hospital with burns over most of his body.

must remember to keep spare tanks warm and make sure no ice has formed around fittings of both tanks and units being used. ice chrystals form on necks of tanks when they are cold as you hook up a new tank. these chrystals cause propane to leak out around fittings.

a couple of years ago my son-in-law, his dad and i were out chasing crappy. one of the lanterns ran out of propane. the s-i-l change tanks and he ended up frost biting his hand when the tank wouldn't seal up and the tank leaked onto his hand.

wouldn't think that sticking your hand into the water to grab something that was falling in would chill you to the point of hurting you. drop cell phone today into hole reach in a grab it--a great save-- but a couple of minutes later i had to leave because my hands started to cramp up and began to hurt really bad.
the sudden plung into the ice water with the hand caused the muscles to ball up/knot up and tear in the back of my left hand. the hand is swelled and black and blue.
the doc says that is what causes heart attacks when someone suddenly gets wet with cold water and it does have to be freezing water.