But it's not retreating blade stall - just a function of no or ineffective flapping restrainers and droop stops and poor cyclic control
FYI: the flap restraints wouldn't have been engaged at that point and if the hub hit the static stops with a blade approaching the tail it would have flexed down right about that much and modified the tailboom. Actually its a pretty classic B model result with a fast auto and late flare. Have fixed enough of them over the years. L models you get a different result. Good job on the pilot keeping it vertical though.