what does it suggest about Reg that he felt like a balloon filled with helium? The Fretful Porpentine

In paragraph 18, what does it suggest about Reg that he felt like a balloon filled with helium?

It suggests that he is overwhelmed and dizzy.
It suggests that he is overwhelmed and dizzy.

It suggests that he is talkative and proud.
It suggests that he is talkative and proud.

It suggests that he is accomplished and arrogant.
It suggests that he is accomplished and arrogant.

It suggests that he is relieved and elated.