Here we have a small but entirely amusing little video from 1991.

The video is actually a commercial for Alka Seltzer from the country of Mexico. And who’s that starring? Well, it’s none other than Guillermo del Toro, the extremely popular director behind films like The Devil’s Backbone, Hellboy, Blade II, Pan’s Labyrinth, and Hellboy II: The Golden Army.

Mr. del Toro also directed the commercial, which fittingly shows his turning into a werewolf before some good ol’ Alka Seltzer sets him straight.

You can see this gem of a video by clicking on over to the other side now!