I was riding along happily today (around 20mph) and ended up with an insect of some sort in my eye which then proceeded to squirt something irratant into it, ouch, that'll teach me not to wear glasses. Since going 20mph down a main road with both eyes tightly closed didn't seem such a good idea I hit the brakes. Unsuprisingly the back wheel lifted off the ground and tipped me forward. I didn't go right over the bars, just slid forward into them (my knee bent the left shifter lever which after being straightened out was find). The bike hit the ground (losing my mirror) and I ended up standing over it. Not too bad considering what could have happened. My main concern is for the bike (I'd be absolutely lost without it). Since I started cycling I've heard a lot about aluminium frames cracking and I guess that I've become a bit paranoid, I've checked the bike over and it looks fine, I've also tied thin elastic around the headtube to both dropouts to check the alignment (which is fine as far as I can tell) and also ridden a further 30miles without problem. I guess that my question is just how robust are alloy frames (mine is oversized plain guage 7005 T6), is a spill like I've had anything to worry about or do you need to hit something head on to do damage? I guess that aluminium alloy must be a fairly sound material considering the number of bikes that are made from it but then again I do seem to hear regularly about how prone to cracking it can be. Thanks for any thoughts, Paul.