Walk up the Yellow Brick Road and address the Ass-Wizard with a question - as long as you're ready to receive an insulting reply, punctuated by great gouts of flame :)
At the time, these were the biggest flame throwers I'd ever seen. They were operated by long levers. Note that the pilot light of the right flamethrower is failing to ignite the fuel, which is jetting unburned in an arc toward the other one.