Two spring to mind..

Just outside Llanelli, Wales..

An 'A' single carrigeway road. line of moving traffic with me somewhere near the back.
the twat in a shonky old mondeo behind decides he is gonna overtake REGARDLESS,
so out he goes, round the outside of a corner, WITH things coming the other way,
flashing him like fook and getting out of his way... cunt!

similar thing just outside bath, the A420 in Marshfield,
line of traffic, guy in some 5 series decides he is too important to wait,
so off he goes down the middle of the road with people coming the other way!

utter cnuts!

but the one thing that fooks me off, is when there are road works or whatever on a dual carrigeway, most people get in line and wait... but there is always the coonts who just drive right up to the front of the cue and try to push in.. that and motorbike riders being on my side of the road, coming at me just because there is a cue on their side of the road!