I find it so funny because he is mocking people who don't have a grip on reality. You've probably seen these people. Mostly, they are stern authority figures or just tradition obsessed old people. The day they realize that the world is much more important than anything they can imagine is incomprehensible to them so they look shocked! They think they have the world planned out to the T and then once they hit reality, they are totally helpless.
I find it so funny because he is mocking people who don't have a grip on reality. You've probably seen these people. Mostly, they are stern authority figures or just tradition obsessed old people. The day they realize that the world is much more important than anything they can imagine is incomprehensible to them so they look shocked! They think they have the world planned out to the T and then once they hit reality, they are totally helpless.