Brandt's brain in a new body (Freddie Jones):
'Brandt' woke up and started walking. Why was he strutting/swaggering? I understand he just stirred and then was stabbed, but continued throughout the remaining film.
Perhaps Jones' pants didn't fit well?
"Eye of the Beholder"
I would be swaggering too if I just woke up and found myself in a different body I was unfamiliar with. He stumbled around, but I did notice that he did pretty well after he had been stabbed. The rest of the movie he seemed better, as if he weren't bleeding anymore and the pain was gone.
"Cum Grano Salis"