My work on Hostel: Part III included 2D tracking with After Effects, painting out elements, green screen keying, adding blood squirts, and various other compositing.
Tracking phone added screen.
Created the CG arrow tracked it on to head.
Tracking shot all screen replacements.
Created CG building and interface with countdown timer.
Tracked windshield and added blood squirt.
Composited face getting squished into spikes.
Animated dummy getting run over by car on to spikes
Tracked shot, green screen replacement of rear window, added dust effects.