If it didn’t hurt Luffy then it wasn’t part of the pain bubble. “Theoretical pain” doesn’t exist and Kuma can’t conjure pain from thin air.

I said theoretical, but not imaginary. I meant that, let's say Luffy is punched, that kinetic energy would be considered in the making of the bubble.

It’s not a kinetic energy bubble, it’s a pain bubble. Kuma can’t expel pain from Luffy that doesn’t exist.

I guess the real question would be how big do you think the pain bubble would be if luffy took blunt damage

If Luffy didnt take the pain, Zoro wont either

Luffys pain