When the dragon attacks Helgen and you gotta run up the tower, my PS3 undergoes the super freeze. It is a ps3 slim and never freezes on my 15 mb character. Why is this?

i had this freeze the very first time i ever loaded up skyrim on a ps3 that was brand new(literally skyrim was the first game put in the system) after the first freeze it never happened again tho, i do still get a little mini stutter at this point when the game forces an auto-save. i would suggest clearing out some of your old saves if you have alot built up, disable auto-saves(you may have to load your other character to do this but the changes you make in your options will carry over to the next character). although it wont prevent the forced auto-save i mentioned it may prevent future freezes