Just as an aside, if you're trying to get rank 5 of Passive Aggresive (kills from the back of the 4-seater), skags make terrible targets. They run up too close and try to eat the vehicle, and you can't target them. I usually head to the Highlands and melt everything there, but someone might know a better spot.
if you don't want to wait until you're higher level where you one-shot everything target Monglets and Pup skags.
powersliding is fairly poorly executed in this game, but turn and power slide a little bit away from the mobs (at speed). release the gas as you start to slide and you should slap the mob with the rear half of the car (bandit one). once you do it a few times it will start to go faster. pups and monglets can be one hit from the beginning of the game, so they are easy targets. --- Borderlands 2 is turning out to be Borderlands MMO pre-alpha. I didn't pay $90 to be a beta tester.