Need answers

*follows comments to see if someone explains*

She showed him his greatest fear. He was afraid of becoming the monster everyone already thought him to be, so when she showed him that vision, he raged and became that monster. That's why he's so somber afterwards and shows an uncharacteristic aggression towards Wanda when they meet again.

This is a theory(and oops if there's a real answer)!!!! But what if she showed The Hulk Bruce dying of something (maybe even old age) and he couldn't stop it from killing the only person The Hulk knows. And possibly once Bruce died The Hulk would be left completely alone in a body/mind that used to have Bruce. I think that would make him afraid and want to lash out like he did...

She showed him "age of ultron"

She showed him Harambe being killed. that's why he got so mad

She showed him that he is unable to have sex.

i think it's that he'd totally lost control off the hulk transformation

Planet Hulk

She showed him the two incredible hulk movies