Is it a bad call or is it just me?

occasionaly, other players muppetry really gets my goat, this one did as i scrapped my way to final table of the 3500 guaranteed. i have approx 38k when a serial all-in merchant moves all-in for 43k (blinds 3k-6k) i have KK and call, in a flash

The player to my left then begins to dwell up, and decides to call with AK, now i thoght this was a bad call, obviously as the ace fell and i departed in 7th, but he has to be worried about my hand. He must think a pair is out and the other guy has either a pair or an ace(which would give him 1 less out)

he had 40k in chips, the original alliner had 99........ who calls with AK here???