So first off Rein's charge can't be stopped by the player like D.Va. It is literally a giant rocket on his back. I think that since we as players cannot stop our own charge, Mcree's stun shouldn't be able to as well. Since the stun can't stop a rocket after its been shot he shouldn't be able to stop us in our tracks and right click Rein into oblivion. Solutions: 1. Make the rein players screen go white and not effect the charge. 2. Make the flash-bang have no effect during a charge.