This only shows why a high boot is dangerous play.
Just imagine it was closer to his eye...
Players should learn that IF they take their foot as high they have to be very sure there isn't someone's head in their way.
The risk for that is getting a straight red and a ban.
That's why the ban for Mané shouldn't be reduced. The message must be: SAFETY FIRST!
Live in the match I wasn't sure about the red card, seeing it as an accident, as I couldn't see the contact.
But like elbowing we also should take the risks of high boots out of the game as consequent as possible.