Denver-based Zen Magnets had to destroy 400,000 magnetic balls to comply with a Consumer Product Safety Commission order. The company marked the occasion of loading the sets of neodymium magnet spheres into a furnace that reached 1,000 degrees Fahrenheit by creating a time-lapse video condensing the 6-hour destruction process into 90 seconds.

The video was released Monday.

Zen Magnets’ meltdown began in 2012, when the federal consumer safety regulators asked 13 companies not to manufacture, import or distribute the spheres, which were marketed to adults as desk-fidget toys, but could have led to serious internal injuries if they were swallowed by children. CPSC sued companies that were not compliant. Zen Magnets fought back.

In 2014, the commission banned the magnets. Two years later, the 10th Circuit Court of Appeals overturned the ban, but an order for the destruction of Zen’s inventory had already been entered.

Zen Magnets, which is now awaiting a hearing to learn if the CPSC will appeal the overturned recall, now is the sole remaining U.S.-based magnet sphere company.

“Zen Magnets is pleased to be open for business again, even if it’s for a limited time,” company founder Shihan Qu said in a news release. “Although we’ve had the most success contesting the CPSC of any company in recent history, the battles aren’t over, and there is still much uncertainty in the future.”