it crashes when the damage power is above 1350, which is the exactly power when ur hit a wall at 50kph, so some times u gonna crash below 50kph depends on what are u hitting, for example, if a car hits u at 25kph and u hit him at 30kph at the same time, u and him gonna crash because the additional impulse gonna be above 1350 dmg. this makes it more realistic, but i can improve it better, wait until a new update.

Thank you.