I'd call flop, fold turn. Unless the player is really loose/bad or you think he's trying to defend his blind or something he clearly wants to get a 2k stack in here and I hardly ever see an overpair take down a 4k pot unless it's against another big pair, which you're probably on the smaller end of if this is the case. The big overbet is strange.. not really sure what he'd do this with I guess maybe JQ thinking his pair outs are good too but other than that there's no draws out there, you're probably way behind