[Opellulo]

I understand that Gurps uses a quasi-scientific frame that makes for very funny speculations but i think "Regeneration" is meant to be like in the comics: your body remembers its "unhurt" form and regenerates until it has achieved it.

It's not "tumor like" random regeneration but "Wolverine like" time compression: because being bedridden and then having to make a ton of rehabilitation it's both boring and a bummer.