Original sentence: Critics contend this is not physically possible,  However, in the Zapruder film Connally continues to clutch the hat even after Kennedy's head wound, this being a point after which everyone (including critics) agree Connally must have already been hit
Edited sentence: Critics contend this is not physically possible,  and indeed it seems counterintuitive.However, in the Zapruder film Connally continues to clutch the hat even after Kennedy's head wound, this being a point after which everyone (including critics) agree Connally must have already been hit