If you happen to resemble an off-balance Oompa Loompa when you’re shadowboxing, you might want to learn some tips from the master. Square Enix has released a brand new Sleeping Dogs trailer featuring a ferocious appearance from George St-Pierre. In it, the French Canadian mixed martial artist performs a routine that will have you shaking in your slippers.

The fighter was brought on board to ensure the open-world adventure’s combat was authentic. Watch him throw some punches in the video below.