It might be framerate, I'm on 360 but I get that problem a little bit on some games, BoP included. I've only noticed it during the tutorials once or twice though, after that I've been clear for the rest of the tutorials and the campaign, never saw it again.
If it's possible on ps3, installing to your HD might help. Also check if there is a setting in the game options to lower the framerate setting on the game.
That's all the advice I can give, someone else might know more than me.
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