Using the R2 button: step left, step rught, step left, then use R1 to walk backward 1 step and forward one step, then turn completely around 3 times, jumpforward and press the roll button, Lara should freeze and sort of looked squashed, you will see the available cinematic for the end of the level. Warning do not try this on the last level, it won't work, and besides I'd rather look at Lara in a nighty than see the ending.