Change particle bounce relative to the speed of the GameObject colliding with them?

Hi there, I'm super new to Unity - trying to do my best to help out in a fun project I was invited to take part in.

I have a particle system which creates a big field of particles, like fallen leaves on a field. An object (capsule) with a 3D collider on it moves the particles via the collision module, as it "walks" through the field.

What I want to happen is that the particles move/bounce more or less based on the speed the gameobject is going. Essentially, create a more natural "kick the leaves around" feature. (The user data comes from Kinect/user feet positions.)

I don't know C# but am trying to figure out a scripting method.

Any tips would be very appreciated! Thanks in advance!