10/20 JJ, limp/reraised

[outdrwn]

Call and pray for a jack on the flop.

[creedofhubris]

You're playing for set here unless you've seen him get out of line.

It's high variance but slightly +EV if he's got a big pair he'll push with. Metagame, you don't want people thinking it's easy to blast you off your hands preflop or they'll steal pots like this all the time.