I don't know which I would rather see- McGregor coming out swinging like a maniac- just a flurry of fists and knocking Mayweather out  cold in 15 seconds flat or it goes 9 or 10 rounds.
In the second scenario, McGregor does well but Mayweather would have won by decision all the way through but then... he just knocks McGregor out- literally knocks his lights smooth out by clocking him with a right hook.
Either outcome would make me ecstatic.