I would shove esp. in an APAT national. If he has AA fair play- however in a national I would probably see him turn over QQ, JJ a lot of the time and maybe even AK AQ or 10,10.
I won"t mention the person but in Luton I made a standard raise UTG with QQ- got re raised all in from the big blind- dwelled for ages, almost folded but ended up calling (fish) and for shown 10,10
At a higher standard of play I fold (no disrespect to anyone, we"re all amateurs here) tho I suspect a pro player may take a different line with AA.......