Weird KK hand Main Event

[TheNewf]

Gonna do this one in steps. 50/100 blinds. 20K starting stacks, I have 40K (thinly veiled brag) others have somewhere close to 20K.

Seemingly spewy Euro guy makes it 500 UTG. I call with KK UTG+1. Folds to an old guy in MP who makes it 1500. No real read on him yet (he hasn't done much) but he looks like the nitty type, but it's the main event so who knows.... The Euro calls and I?