Firstly - how the feck was he supposed to see the gravel? Try going 30mph down the road and count how many pebbles you notice as they wizz by on the tarmac while trying not to crash. Hard isn't it? Secondly - Anticipate everything? Bollocks. In that case you should've been looking over your shoulder every few seconds incase some careless/blind driver decides to twat you up the rear. Thirdly - Yes it does. Obviously. Driving over some gravel on a roundabout in a car will not result in a skid-out where you lose half your skin, whereas the same on a motorbike probably will. Also, think about the prejudice on the roads. People on bikes often act like twats when near cars (overtaking, undertaking, following too closely etc.) which results in car drivers not giving a f**k about bikers and cutting them up. The experiences you have on the road are hugely influenced by what vehicle you're in. Your comments about Mark's dad falling off were dumb. He's only human and doesn't notice everything. I'm sure he was being a decent motorist and looking to his right before pulling on to the roundabout, not preparing himself for a pebble on the road, terrorist attack, meteor shower, oil spillage, attack from a seagull or anything else that he should be 'anticipating'. Grow up kid.