You are not really happy. What's that 50-dollar joke on MTV?

I think it's the sentence' you're not really happy'

Because the first few passers-by laughed after listening to it, probably because they thought how could they be unhappy ~

But behind the MV, all these people's smiles disappeared, and then "Are you really happy?" Appear on the screen. They didn't really realize the meaning of this sentence until they laughed.

Then a girl ran away crying. I think she is in love and has been pretending to be strong. This sentence has reached her heart.

But I remember a pregnant mother came in the middle, and I think what the monster said at this time should be something like "grow up to be a really happy person" ... that's what he said to the baby. ......

All the above are my own guesses. I can only ask what Mayday is ~ but that joke may be just a symbolic performance, just left for us to imagine. .......