Character: Collision on head should cancel vertical velocity

[DennisSmolek]

Right now when you jump and hit your head, you float in space until the velocity cancels out due to gravity.
What should happen is when you jump and hit your head the vertical velocity gets set to 0 and you start to fall.

I think if we take a normal of the impact point we can determine either to set the value to 0 or even redirect the force which would be kinda like a bounce I dunno.