When not getting busted by USADA for taking SuperSoldier Serum, Cuban wrestler Yoel Romero is one dangerous dude.

Thus far in the Octagon, we’ve seen him take out former champ Chris Weidman, former champ Lyoto Machida, Tim Kennedy… the list goes on.

This weekend, Romero gets the main event slot at UFC 221 in Australia. His opponent: Luke Rockhold.

Odds are, Rockhold has an inkling at just how explosive Romero can be, and just how deadly that jumping knee is. The big question then is whether or not Rockhold – himself a former champ – can stop that knee from cracking his forehead open.

While you ponder that mystery, here’s a video of Romero in action.