Originally posted by Doctor-Alvis
Not necessarily. Just Banner's brains + Hulk's body accomplishes the same thing.I can think of a few. Some kind of high concentration knock out gas, low oxygen concentrations (provided he still needs to breathe, which could lead him to adapt, who knows), adamantium and/or vibranium coming into play, freezing, stasis, Tony Stark's paralysis key chain thing, you know that thing, forcefields, toxins, some kind of super deep pit.
Yeah, there'd be no need to get really complicated with the story or anything, just explain that by concentration, he was able to take over the Hulk's body.