Apparently Videoing is common in Canada, for insurance purposes although I don't think handheld is legal!
There was a clip not too long ago where a truck lost it and smashed throuht the central barrier and the guy who caight it on tape missed it by a couple of feet:
http://www.youtube.com/watch?v=oU-xpw8tsRc
Onto Scottish motorways (and roads in general) - they are a disgrace with the central reservations and hard shoulders littered with debris all ready to blow onto the carriageway. I don't know how the 'contractors' get away with it, as they are paid millions to maintain the roads. You could eat your dinner off English motorways by comparison.
Scariest I had was on the Edinburgh bypass when a box fell off a van - luckily I was far enough back to avoid it (just) but even luckier it was a cardboard box with paper and polystyrene, that was obliterated by about three cars running right into it - had it been anything heavier, I shudder to think.