Workouts can bring out the aggressiveness in any individual - sometimes to the point of strangeness and taint-touching, apparently.

Conan O'Brien recently teamed up with the world's highest-earning comedian, Kevin Hart for a session at the gym - with (as you expected) hilarious results. Through bouts of verbal and physical sparring, the duo performed pull-ups, medicine ball throws and more.

While the segment was primarily to help promote Hart's new stand-up special What Now? where he performs in a football stadium full of (according to Kevin Hart) 53,000 people, Conan was having none of it, going as far to say: “There’s no accurate count for how many people were in that stadium! That’s what your accountant says, for tax purposes! I’ve seen shots and it looks like 1,500 people tops! Those are all relatives you invited!”

Things certainly got a little heated, but that's all part of the entertainment value. Watch the hilarious clip above.