Falling through the bottom of the lift?
here is a fix that works for most people.
Open the PandoraEngine.ini (on vista it is on C:\Users\USERNAME\Documents\My Games\Legendary\PandoraGame\Config-Folder) and search for "MaxSmoothedFrameRate=300" and change the value to 60. So the game runs at maximum 60 fps. Play through to next check point save then edit it back to 300 and continue game.
If a setting of 60 does not work try 30.
Game will not run so good but it's only a short level to next checkpoint where you can then reset back to 300.
30 and standing NOT in the middle of the lift but on the "border" did it for me. Or it was just one of these.
WinXP: C:\Documents and Settings\<YourName>\My Documents\my games\Legendary\PandoraGame\Config\PandoraEngine.ini