I mean...Ohma's "powers" have been hinted at from the beginning, shown, regularly built up and explained and now in this chapter we get to see that Kure was talking game so that no one would realize that Ohma's techniques were actually affecting him so in the end a fight between them will come down to exactly what his master said; martial arts.
Ohma is a martial arts monster and Kure is a physical prodigy who doesn't need technique or moves to dominate people. So now that all his gas is gone, so to speak, Ohma legitimately has a chance against him if he just fights as he always should have been fighting.
Like with everything we've seen up til now with how much this manga plays with "realism" and what human bodies can do, suddenly Ohma getting up after all this is unbelievable? Hardly.