Something that could indicate trying to dodge, or consciousness leaving the body. It’s not unreasonable for Voldie to think “I’ve lost here, no matter what I do this body will be unusable in the near future, in case he has a plan to incapacitate me without triggering my Horcrux wards I’d better go someplace else”.
It is implied that while Voldemort can stop possessing a victim at will, he cannot stop inhabiting his own body at will.
[EDIT]Though Harry internally states the opposite:
He cannot be imprisoned, for he can abandon his body at any time.
This is the part I was thinking of:
The soul he’d created for himself had to be anchored in this brain, it mustn’t be allowed to float free.
Voldemort had the ability fly free from his body. The last sentence you quote is Harry thinking that he mustn’t allow that to happen, not that V doesn’t have the capability. If V goes free then he must be defeated again; Harry is avoiding that outcome.
At least, Harry thinks that he did. (The last sentence I quoted is the section that I had misinterpreted as evidence that he couldn’t, but I wouldn’t take Harry’s speculations as the most likely possibility instead of a conservative estimate.)
It is implied that while Voldemort can stop possessing a victim at will, he cannot stop inhabiting his own body at will.
[EDIT]Though Harry internally states the opposite:
This is the part I was thinking of:
Voldemort had the ability fly free from his body. The last sentence you quote is Harry thinking that he mustn’t allow that to happen, not that V doesn’t have the capability. If V goes free then he must be defeated again; Harry is avoiding that outcome.
At least, Harry thinks that he did. (The last sentence I quoted is the section that I had misinterpreted as evidence that he couldn’t, but I wouldn’t take Harry’s speculations as the most likely possibility instead of a conservative estimate.)
Ch. 107
Ah, right. Thanks!