Uncharted is freezing up!

I was playing Uncharted earlier today (love this game!!!) and I got to the part where those weird creatures start chasing you after you and Eddie have to fend them off in the heart of the vault. Anyways, while I was running away the game froze on me. I paid it no mind and simply restarted the PS3 but it happened again in the same spot. Once again i restarted it but this time I got farther and it froze (again!) when you encounter the creatures a second time, when you have to get the power working again.

So i was wondering if this has happened to anyone and this is just a common occurance or does continuous freezing mean something may be wrong with my PS3, because I have heard there are some crap PS3 consoles out there. (I have the new 80GB model)

I also just want to add that Uncharted rules so far (haven't beat it yet so don't accidentally spoil anything for me!)

When those creatures were after me I stopped shooting and the game didn't freeze. I don't even see the point of shooting at them anyway because that corridor is so short. And when i got to the bunker a second time, i entered the hallway where the beasts came and i shot them in there instead of hanging back in the previous room, and it didn't freeze!

I'm glad this is a typical occurance, i got a little worried at first. Just hope it doesn't happen again, kinda annoying.