The only bodyparts which can be dismembered so they don't have a joint attached to them are the feet and the groin, aren't they?

All joints can be disembered, bodyparts without joints can't be disembered

What I meant was that I can for example rip off my feet without the ankles. Same goes for the groin (I can rip it off without any joints attached to it). Are those the only ones which can fly around without any joints attached?

I think he was referring to the blocks, like groin and pecs.

And yes, they can be dismembered.