He didn't think it was remotely possible. He couldn't control his entire body despite him not feeling the pain of training. His muscles were torn after getting dragged around by an old man who had a newfound passion for sadism.
"Old man! What did you do to me?!"
Bob squealed whilst laying on the ground face down. As per usual, he set the pain levels to one where he could feel, but not be overwhelmed by it. This is to say, he wasn't feeling too much pain, and yet he couldn't move an inch.
"Young'in. I'm sure you've heard of body reconstruction before, right?"
"What's that?"
"It's bullshit that people feed to the unknowing. There is no need for a body to be reconstructed, there is only an accumulation of skill. Think about it, if one's body were to drastically change, wouldn't that reverse all of the unique tricks one could do with one's own body?"
"Uhh, yea. I understood nothing from that."