If Hulk attacks and succeeds: Thor takes stress, so nothing happens, or also a consequence, meaning an aspect happens. Hulk gets a boost (+2) briefly.
If Hulk attacks and fails: nothing happens.
If Hulk Creates Advantage and succeeds: Thor gets an aspect placed on him, Hulk gets at least a +2 or a +4 from it.
If Hulk Creates Advantage and fails: nothing happens, or they happen but Thor gets a free invoke on it.