Again, this is not part of Doctor Whooves and Assistant. I've been watching an ask pony tumblr and this is something that happened on it. Keikoandgilly (Whooves) liked it so much that he wanted us to record it.
The original is here: http://askthedoctorallons-y.tumblr.com/post/13538919309/and-that-day-equestria-lost-an-angel

Derpy is voice by me
Doctor Whooves is voiced by Keikoandgilly

Also, I recorded on my poop mic because I was too lazy to get up and hook up my pro mic.