If you're doing 25 in the left lane, and suddenly decide to swerve across 2 lanes of traffic into the right lane, only to have someone traveling at the speed limit of 50 come up behind you and have to slam on his brakes and blare his horn at you, DON'T KEEP PULLING OUT IN FRONT OF HIM!!!
Only through skillful driving (on my part) and the time and money I'd put into suspension and brake upgrades averted an accident.
If I'd hit, it would have been a nearly 2.5 ton Caprice against a 1.5 ton VW. Ouch.