Striking your Ulnar Nerve

[tiger7]

I'm doing some homework for physiology and this is one of the questions:

 

"Striking the ulnar nerve in your elbow against a hard surface (sometimes called “hitting your funny bone”) initiates action potentials in the middle of sensory and motor axons traveling in a nerve. In which direction will those action potentials propagate? Explain."

 

So I have two questions:

 

1) I said that it will travel in both directions since there is no absolute refractory period to prevent it from traveling back towards the axon hillock/soma. Is that correct?

 

2) If that is the case, what would happen when the action potential that is moving backwards reaches the soma? Does it actually cause a sensation of any sort?