Zac Efron just explained why his jaw, much like the Grinch’s heart, seemingly grew three sizes overnight, and the backstory is both painful and a little funny. Last year, for Earth Day, the Hairspray star appeared in a musical video (shown below) looking, let’s say, swollen. Fast-forward to the 1:50 mark to see him sporting a jawline much wider than usual. The Internet quickly decided that he’d had some sort of botched Botox or filler procedure, but in a new interview the actor revealed the truth: He’d broken his jaw.

He was running through his house in socks (cute) and slipped and smacked into a granite fountain, knocking himself unconscious, he told Men’s Health. When he came to, his jaw was hanging off his skull, and as he healed, the surrounding muscles got huge to, I guess, hold his skull together? I’m not a doctor, but Efron explained that the facial muscles work together “like a symphony,” and that sounds right to me. TL;DR: He does physical therapy to keep his jaw looking normal, but he took a break around the time he made the video, hence the bigness.

Obviously, I had to see for myself what kind of fountain dared hurt our prettiest boy, and if you are also curious, here are pictures of the house he sold a month after appearing in the Earth Day video. The fountain in question seems to be the small outdoor waterfall feeding into his hillside pool. And you know, if I broke my face, I’d wanna offload my house too. Painful memories and whatnot.