As seen in the video, sky walker turns to the door to close it however when he turned to Tyrone, Tyrone had an M82 at the meantime sky walkers gun went from passive to attack it seems. Tyrone clearly had it first. And to be honest, that is a fucking M82 which is way way more powerful than a shotgun. Basically Tyrone had the advantage with his weapon of choice. Sky's weapon would've taken two shots to kill while Tyrone's is just an instant death