[Crispy]

I am going to have to agree with some of the others. You probably saw the flop and thought runner runner straight or runner runner flush. However, you are way out of position on this one and there is almost no chance for a free card so I either check/fold or check/raise depending on whether you think the perflop raiser will shut down on the turn if he hasn't hit anything. Calling is out of the option, you won't get rid of any aces by doing this.