Just as the moth is drawn to flame, so too are enemies drawn directly into the Pyro’s flamethrower of doom.
If you didn’t catch the first/last Team Fortress 2 Pyro Lesson, this would be a good time to do so. If you have indeed seen it, now you get to see the hit sequel.
What can you expect, other than awesome music, hilariously timed captions, and screen-shattering frustration? You’re just going to have to see for yourself!