Seriously that so called bone transform Baki said there was totally comedy for me because that doesn't even happen in isekai (although I don't know much about isekai but still) well, it's Baku universe after all everything can happen here!
They said about the joint thing earlier in son of ogre that it worked mainly with imagination support so it makes a bit more sense (but yeah it's baki universe anyways )
10 seconds of getting stomped in the face on the ground by a man weighting about 300 pounds of muscle and fat, and all it took was a few seconds to be in tip top shape.
well if we can believe in santa or tooth fairy for a couple of years in our life then itagaki telling us our bone can be imagined as a whip is totally believable 😂