Last time I felt smug was on the interstate here... some guy with a big truck (and little ___) towing a horse trailer couldn't stand that he'd been passed by us. So he sped up to about 90MPH to pass us... fine by me, I let him pass and slowed to hang back a bit. So no less than five miles later, I smell burnt rubber and start to see the remnants of a blow out. He'd blown one of his trailer tires and was pulled off the side of the road. I laughed at him as we went by, which probably wasn't very nice, but I did it anyway... and then my instant karma for laughing kicked in and I ran straight into a nasty swarm of bugs that completely covered my visor!