I'm not wondering about injuries carrying over, it's more like... if it's reliving the experience, that was part of the experience. The experience involved powers. A memory could involve flying because you're Superman and it's this great highpoint that is heavy in your psyche. Or it could be the strange surge of energy you got the first time you channeled the soul of Maxwell, Lord of Spirits. Or for maybe a better example, if a character has lived their whole life underwater and has dreams and memories set underwater, the way you're describing things, anything like that would be impossible.

It's not about injury; that's the easiest thing to talk about because it's most vivid in effects. Trying to put it more clearly, I'm asking, basically, is if any kind of memory or dream that involves anything not baseline human is impossible because powers are nulled? Or if, because powers are nulled, the memory/experience/fear would be a sensory illusion (as you indicated would be the path with Lyall's case)?