I probably play this hand the same way. At $2/4, it is not often you find players betting very strong holdings right out on the flop like that. What hand other than A6s could villain be limping in with in the hijack? I guess with 27% VP$IP it could be K6 but I don't see Q6 (villain is definately not slowing down with the made boat) or J6. I do sometimes see people go nuts with just top pair.