Stop in for a cup of coffee

It is a bad day, when you are all ready and set up to weld. Using a TIG welder. Everything set up, turn on the gas, no gas.WTF ??? Somebody used my rig to weld with in my absence and did not turn off the tank valve.:mob::mob::mob::mad::mad::mad::wtf::wtf::wtf:
That right there is why MSHA will write a high $$$ ticket if you leave the valves open on a oxy-acet torch. That flammable gas and that combustion supporting gas is gonna find a way out somewhere and do some harm possibly.