Always always expect the most unexpected and bizarre things to happen when you are riding.
1. Deer in the middle of a 1,000,000 plus populated city walking down town.
2. Semi trailer coming at you with no truck pulling it.
3. Car with no one driving it coming down the road.
4. Fireworks coming out of a car at you and everyone else.
5. Truck tire flying over your head at about 80 miles per hour.
6. A car pulling out directly in front of you,but stops in time, only to start out again and almost hit you.
All these are true, and there are many more bizarre things that can happen.