During the fall, Bruce Banner turns into the Hulk who catches Glenn Talbot, unconscious for the fall, saving the Major from certain death.
The Hulk then leaps off, leaving Mongolia, then Asia, crossing the Pacific Ocean leaping from isle to isle (!), even from plane to plane (!!), until he reaches the USA.
At Thunderbolt Ross' base, Hulk enters a cabin to rest, and turns back into Banner.
Thunderbolt Ross, Betty Ross and soldiers find Banner sleeping. He's put behind bars accused of treason. But the US president (who knows Banner's double identity) orders his release, once again. Now Banner can resume his Absorbatron tests.
Talbot (later rescued from Mongolia) follows Banner to the isle. But before the test could begin, the Leader's Humanoids (again) show up, but this time, they defeat the Hulk using a powerful sleep gas.