He simply becomes angry or something happens to him that get his Adrenalin to spike.
When Bruce banner gets angry he turns into the hulk.
Quite frankly, he didn't want to. At this point in the Hulks life, Banner was in such a state he didn't want to transform back from the Hulk. And, Banner did make appearances in both Planet Hulk and World War Hulk
yes and no. because he can turn into the hulk whenever he wants but if he's not trying and his pulse gets to high his anger will take over and turn him into hulk
Bruce Banner transforms into the Hulk when he gets angry or stressed, triggering a physiological response that activates the Hulk's presence within him. This transformation is a result of exposure to gamma radiation during a scientific experiment gone wrong, causing Banner to unleash his alter ego, the Hulk, with superhuman strength and abilities.
lol, pants fell off.
Bruce Banner AKA David Banner.
David Banner
Abomination is Hulk's Zod,Leader is Hulk's Lex Luthor,Juggernaut is Hulk's Doomsday...If you know Superman's villains better.
the green hulk is Bruce banner
Do you mean the Hulk David Banner?
HULK... some say no no no no no. master chief just has to shoot Dr banner. well the hulk is a spirit kinda. so Dr banner can be dead but the hulk can take his body back turn into the hulk and eventually he would get mad because he is being shot. he would knock the crap out of master chief...however i am a fan of the Spartans and halo but in this one gotta give it to hulk
Hulk on tv, in the comics. he's Bruce Banner.