Seeing the other lane move faster than your lane.
Having an itch on your ankle/foot.
Needing to sneeze.
Hearing police sirens in the music you’re listening to.
Seeing a cop car in any capacity.
Driving behind a semi carrying a bunch of stuff that’s barely strapped down.
Having traffic come to a sudden stop but being too far away to see why.
Trying to stop on a tiny patch of ice.
Motorcyclists weaving in between lanes.
Any more to add?