Elon Musk has sold over $4 million worth of flamethrowers. The Boring Company is selling one flamethrower for $500 (plus tax), and Musk has been tweeting milestones as they’ve hit.

Musk sold 1,000 units in the first three hours between the night of January 27th and the early hours of the 28th, according to his tweets. He sold another 2,000 during the day, with that number reaching 7,000 early this morning. At the rate they’re selling, it’s safe to assume Musk has cleared the $4 million mark (or 8,000 flamethrowers). Musk is selling a total of 20,000 flamethrowers.

1,000 ordered already, only 19,000 left! — Elon Musk (@elonmusk) January 28, 2018

Here, we made a chart to track this incredibly important milestone with dubious scientific rigor:

Musk had previously promised to sell the flamethrowers if 50,000 of his The Boring Company hats sold. My question is this: what would you use a flamethrower for? Musk himself suggests using it to roast nuts.