I've seen some pretty stupid driving in my time. The most astonishing displays seem to come from N/A cars trying to race Turbo'd cars.
I was driving behind an R32 GTST one day on Mona Vale Rd (Sydney) when a commodore station wagon came RIGHT up my arse and was beeping and flashing his lights. I was like WTF??? Wasn't in the mood for shit so I pulled over to let him pass and he starts harassing the skyline. By this stage I'm thinking "OMG you ****wit!!!" The Skyline driver tried not to let this bother him but after 5 minutes of constant beeping, light flashing & being cut off for no apparent reason, he'd had enough (as I'm sure all of us would) the road goes from a 60 to a 90 zone. and as soon as it came along the Skyline gunned it, leaving the commodore WEEPING. As if this wasn't enough indication that the commodore had NO CHANCE, the guy then proceeded to chase him waeving in and out of traffic to get past it, cutting EVERYONE off making them all jump on the skids, hooking up the break down lane round bends and genrally being an absolute TOOL.
I could only shake my head in disbelief and when I glanced over at the dude next to me, he look ed back and gave the wanker signal to which I laughed