Newton's first law.
If someone collided with you in such a way that you got pushed over 100. It will count.
Generally it's better to set to 80. This way when those police ships who are too stupid to realize they're coming at you too fast knock into you in their haste to scan you, you don't break 98.
I thought it was deliberate badness on the part of the cops.
Talking about speeding.