Anthony Johnson practicing uppercut that KO'd Glover Teixeira (UFC 202)

What do you think this Anthony Johnson practicing uppercut that KO'd Glover Teixeira (UFC 202) video?

Anthony Johnson practicing uppercut that KO'd Glover Teixeira (UFC 202)

Anthony "Rumble" Johnson warming up the morning of his fight with Glover Teixeira, training the uppercut that knocked out Glover Teixeira in 13 seconds.
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