I loved the HL2 car levels - probably because that thing sounds so cool damn cool, especially when you hit the boost I loved rolling up on a settlement, jumping out, blasting on some baddies, then jumping back in the car and tearing off. Lots of fun. The crane part was pretty wicked. I remember the first time, I parked the car juuuust out of range of the crane. I didn't want to go down and move it, so I managed to swing the big magnet out just far enough to grab the car. Cool moment.