Here's a short video clip of about 8 people testing flame throwers all at the same time. It's hard to tell if this is a training exercise or just a bunch of people playing with flame throwers. In any event they are in a semi-circle all firing the flame throwers up in the air towards a central point. The flame looks to be shooting a good eighty feet or more up into the air and raining flame. Farther into the video at least four of the flame throwers seem to flame out. I don't know if they changed their nozzle setting or what but some of them start blowing out mist and no flame.