They were accusing me of fighting with Bin Laden in the battle of Tora Bora; of being in charge of weapons stores; of being a terrorist recruiter, though I'd only been in Afghanistan for a few weeks, this American guy grabs me by the head, and he slams it backwards against the wall. In my mind I think I must try to save my head so I tried to bring it forwards, but as soon as I do he grabs it again and bashes it.