"oh god people are going to run me over better have a knife on me i dont know how to use!!!"
honestly, how would a knife help if some guy ran you over.
Obviously:
1. Throw the knife straight into the driver's face.
2. Dive out of the car's way
3. Watch car hit a wall, then explode.
4.Say something badass.
5.Put shades on and walk away.