WSOP $1500 NL 2nd level hand

[crancspanc]

About 1/2 hour into the 2nd level of the $1500 WSOP event 35 (50/100). I am in the big blind with $2900 in chips (starting stack $3000). Very LAG player moved to the table about 1/2 hour ago, he starts the hand with about $2000 in chips. He has pushed all in with Q5 and shown down nothing but weak hands.

Folds around to the LAG on the button and he pushed all in.

I have AK suited.

Is this an obvious insta-call? This could easily be a race, do I want to jeapordize 2/3 of my stack so early for a race?