I guess I'll add in to the zombie thread.
For those with oxy/acetylene torches, do you know the proper shut down procedure?
Close the tank valves. Let the gas fully discharge from the hose. Then, back off the regulator gauges to zero.
If you don't do this, and leave the gauge regulators charged, the regulators can blow off the tanks when the tanks are opened again. I've known of two cases of people being injured this way.