Enlarge (credit: Boring Company)

Over the last 15 years, Elon Musk’s companies have had a big impact on the rocket, electric car, and battery markets. This weekend, Musk entered yet another new market: flamethrowers. Musk’s Boring Company began selling branded novelty flamethrowers for $500 apiece.

“Obviously, a flamethrower is a super terrible idea,” Musk tweeted on Saturday evening. “Definitely don’t buy one.”

By late Sunday evening, California time, customers had reserved 7,000 of the 20,000 units the company planned to produce.