What does he do? Throat fuck almost makes me gag!

I actually wanted to record a simple blowjob video with my neighbour. Could I have known that he would grab my head and ram his cock deep down my throat? It was a completely new feeling for me to have a cock so deep in my mouth. I definitely know now that this guy is quite a horny pervert. How should I repay him for this action? What do you think?