In this photo provided by Zuffa LLC, Ryan Phillips slaps Rob Perez at a Power Slap event in Las Vegas, March 31, 2022. When the open-handed blow is delivered, there's a sharp report and the reaction can be dramatic. Some fighters barely move, while others stumble backward or fall to the floor. Some are knocked out. (Chris Unger/Zuffa LLC via AP)

March 8, 2023