1. As long as your speed is within the limitation of your tire traction and all else is as it should be, the space between you and other objects (including the road!) is the one thing standing between you and crashing. If that space is allowed to drop to zero, you have crashed.
2. Never show off, especially when someone you know is watching. Showing off increases the probability of something going wrong. Being watched by someone you know increases the probability of something going wrong. Add the two together and you don't have a chance, so just behave as if you had good sense.
3. If the people next to you, behind or in front of you, or coming the other way weren't raving maniacs, they'd be on a bike same as you, so watch out for them.


Let's hope there's intelligent life somewhere in space 'cause it's buggar all down here. -- Monte Python