"Me? Well, it's not that hard for.. me.."

Inigo's tone starts out pretty normal.

It's halfway through that it slowly starts to break down as he speaks more slowly. With pauses between his words. As if something is slowly, very slowly, starting to hit him over here.

"A-Ah, wait, you want to do it with me?!"

If his jaw would start to hang open any further, it may just end up on the floor.