Rarely do science vids go viral, but after 100,000 views in just a single day, this one’s on its way. And with good reason: It’s an astounding breakthrough, immediately relevant to soldiers and firefighters (and, no doubt, to plastic surgeons). Gizmodo first blogged about it back in 2008 and scoffed that we’d see it anytime soon given social conservative objections to using stem cells. Turns out that’s not a problem, though. As you’ll see, it’s the victim’s own cells that are used in the “paint,” not embryonic ones. Mind-blowing stuff.

Fair warning for the weak stomachs out there: A gruesome burn injury to a victim’s hand appears briefly in the clip, so if you’re easily queasy, proceed no further.