I believe that 9s (pocket nines) are definitely a shovable hand in your position. 9s are a great hand to get in your position of the game, as they guarantee a chance to double up (you have a reasonable hand, regardless of board). Also, the blinds were coming your way somewhat soon, so the chances of you receiving better cards than 2 nines, weren't in your favour. And the pot was folded to you, so that would increase the chance of everyone ahead folding, and you picking up the blinds. Hope you did well in the tourneament, though.