All Might rotates his own body at such speeds that anyone holding on to him will be sent flying. He starts this move by spinning around and creating a vortex until his opponents can no longer hold on. Then, the targets are sent flying with enough force to break through solid concrete.
Oklahoma has more tornadoes per year than almost any other state due to it being in the middle of tornado alley. When All Might uses his Oklahoma Smash, he spins around similar to a tornado.
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