Yes, bits of transmutated, flaming, bits of Hayato. Hayato was already half a bomb and the rest of him was already underway, as indicated by the fact he's glowing orange and black, he was already half an explosion and the bits that weren't were on the onset of igniting.
Missed the point on the Okuyasu thing, it doesnt matter what CD touched in that instance, as CD used his preciion in his ability to restore not what he had on him, but Okuyasu's main body, which was converted into pure eletrical energy. Cd's power was capable of reverting that state of energy. What matter's here is that the restoration effects energy, it does, it reverted an energy Okuyasu.
While you have a point, that isn't what happened in the instance of the knife or even the bullet screws, Superfly rebounded not the actual act of the knife hitting it but the energy and damage that the knife left it, opposed to where it rebounded the actual act of Crazy Diamond punching it. Honestly thinking on it, I don't know why it differentiated it but point is the things CD restored, fortunately is stated to be pure energy and the rebounding of the damage the knife inflicted. Actually ****, I'm gonna do some research and look at the original manga as well as JoJoveller.
Ok, I checked. It's kinda fucky but the user does actually explain it. All energy and force (in context is kinetic energy) is absorbed by the tower, sent throughout an then sent back out. Even bringing up the conversation of energy in that all energy applied to the twoer will be redirected back out. Not only that but the method of energy applied will be sent back out the same way it was applied, if the energy is of the kinetic variety it'll be unleashed as kinetic, if it's a slash or a cut, it'll be sent back out as the same type of energy. Even abilities will be sent back out if the ability in question is offensive. Which tells us two things, yes Crazy Diamond did indeed manage to revert the kinetic energy and force (that's a keyword in the explanation) but the fact that the Stand's punching it is rebounded as the Stands as well seems odd, if we take it face value, it's rebounding the Stand Energy in that case. Which is neat I guess? Regardless it's explained and said to be explicitly simply returning the energy and force back as per the conversation of energy dictates. (Depending on the energy and force as well it may not even be visible as shown with the energy rebound that cut Mikitaka). Also paying close attention, the energy seems to be intangible as well, given it could cloak objects and use them as projectiles so it isnt a solid type of energy. ****, there's actually a lot of tiny details regarding this Stand, more so than most. This thing deserves a profile.
Actually, Hayato's limbs where shown to be engulfed and exploding as well (his arm started exploding first), it's all simutaneous, unless it's a transfer charge, in which the explosion begins where the the contact with the charge was made, although there is an implosion afterward after in most cases that gets rid of the dust and smoke.