In case you ever wondered how American fast food chain Wendy’s gets their square burger patties so uniform, this “Grill Skills” video will answer all your questions. This training video from 1989 teaches potential grill masters how to press and flip the patties to perfection. Also, did we mention there’s sequins, dancing and RAPPING involved?

Now workin’ the grill Bill, it ain’t so tough. But first of all, you’ve gotta check your stuff…

Fast forward to 1:00 to witness the magic.