Tesla chief executive and inventor Elon Musk has tried his hand at building underground transportation, revolutionizing space technology and bringing electric vehicles to the masses.

The Boring Company — the same outlet Musk founded to disrupt traffic congestion with tunneling — began selling Flamethrowers this weekend at $500 a pop.

If it feels like some sort of running gag, that’s because it started out as one, with Musk noting last year that the company would begin hawking flamethrowers once it had sold 50,000 hats.

But there’s a catch, because the regulation bans unlicensed possession of “any non-stationary and transportable device designed or intended to emit or propel a burning stream of combustible or flammable liquid a distance of at least 10 feet.”

If the demonstrations on social media are any indication, Musk’s flamethrower doesn’t emit a stream of flammable liquid, and its flame falls well short of the 10-foot ban.