When I see a cheerful young man shrieking about how full of...

When I see a cheerful young man shrieking about how full of life he is, banging on a drum, and blowing on a tin trumpet, and speaking of his good spirits, it depresses me, since naturally it gives the contrary impression. It can't be real. It ought to be but it isn't. If the noisy person meant what he said, he wouldn't say it.