blackmagicz;211667 wroteStack sizes...as dennis pointed out there are probably 3 hands you will call and more you will fold in that spot. He just happened to run into one of the 3 hands you are never folding.
This.....at first glance it seems rediculous based on your nitting play, but, I think that is the same reason he makes this play. Your calling probably only 3 hands (in his mind anyhow), and if your 3-bet range is AQ+ or 99+, you're folding more often than calling here.
BTW, OMFG, he crushes MTT