Heading down the M66 Southbound at 7pm tonight (just an hour ago - I'm still shaking from it) I approached its junction with the M60. For those who don't know it, at this point it splits into 4 lanes - L1 and L2 for the M62 and M60 anti-clockwise, and L3 & 4 for the M60 clockwise. I had got into my required lane - L3, (no sliproad involved here - just a continuation of the old M66) and was cruising at a steady 65 - 70mph.
First thing I noticed out of the ordinary was a bit of haphazard movement of the rear lights of cars in front (probably about 200 yards ahead). This made me wary that something may be awry and I eased off. Next thing, I see a couple of cars' wheels lock and the car in front of me perform quite a dramatic swerve into L2 - revealing to me the cause. A pretty smashed up mini horizontally across my lane

. My reactions were instinctive - hit the brakes bloody hard (may have locked the wheels - not sure but no ABS on my car), but was not sure I was going to stop in time, and even if I did, would I be hit by the car behind?? Now I knew L2 was empty behind me so managed to swing the car round into this lane, and as soon as I knew I was clear of the accident got my hazards on - fortunately cars around me had done the same thing providing some warning to following motorists. Was wondering whether to stop but by the time I'd passed it, a few cars had already pulled over to the HS, the van that was following me had stopped behind the accident and I'd already got passed and was still travelling around about the 30mph mark. I also seem to recall L4 was blocked by something; but it all happened so quickly and I was concentrating far more on avoiding being part of the accident than observing it so not sure by what.
Incidentally, the Mini involved I had let on at an earlier slip road - pulled over to L2 to allow him to join the main carriageway. Doing around the 75mph mark as he joined, I thought I'd make a quick burst up to 80 and pull in, in front of him. However as I accelerated, so did he, and more. Being very windy tonight I didn't fancy going more than 80 so let him go and pulled back in behind him as he went tearing off down L2. Now I'm driving a hefty Pug 406 and the wind was making driving that very uncomfortable even below 70mph. So no idea what a Mini must have been like in tonight's conditions - this was one of the older style Minis. And I know from my mate's old Mini how flimsy these things feel even at modest speeds, (he hated driving the thing at motorway speeds for this reason). I do wonder whether he was simply going too fast for the conditions in such a car. On the other hand, he could have been cut-up by some ignorant pillock randomly switching lanes (I know what this junction can be like for things like that). One thing's for sure - the motorway will no doubt be suffering tailbacks as I type this as a result.
Anyway if you've read this far, sorry for rambling. Just needed to get it off my chest as it was quite a frightening experience, (can't remember much worse in my 10 year driving career). Also think it's a very good learning experience in expecting the unexpected (esp as this stretch of motorway is pretty straight and wide). Don't know if there is anything better I could have done - was just glad to have avoided it and even now I don't quite know how I managed to.