Re: my sensei "video clip"
I saw nothing in the video that would suggest Mori Sensei purposely attempted to injure his uke, let alone purposely tried to slam his head into the ground. Comments to the contrary are a sign of complete lack of understanding of what is happening in the video. Yes, at the very end it appears uke came down harder than expected however Mori Sensei was not trying to purposely wipe out his uke. If anything, he pull up to prevent injury.
I guess we in the Yoshinkan see this as normal training while others do not. But to say he was purposely trying to injure his uke is just plane absurd.