Diarmuid takes the controller and holds it as Donatello tells him too--after a moment of turning it over in his hands as if it will help him understand how it works better. It doesn't and most of what Donatello is saying goes right over Diarmuid's head. However, he does latch onto one thing. This is a fighting game. Diarmuid knows how to fight!

"This is a strange kind of weapon then? How do I use it and why is it connected to the box? I can't swing it very well then!"

Oh boy...might want to start from ground zero with this one, Donatello!