Scrambled Eggs in the Shell?

I saw this on Japanese TV this week, and it's odd enough that I thought I'd put up a description. Not sure where it belongs, so I'll put it here. Google doesn't seem to show anything similar, off-hand.

Okay. Suppose you want to scramble an egg in the shell? I.e., you'd like to make a boiled egg, but you want the yellow and the white mixed up when you break the shell. I have to admit, I'm still not sure I understand why you might want to do this, but let's assume that you want to pull off this trick, okay?
( The magic trick! )

So, there you have it. An egg scrambled in the shell. Or at least mixed and boiled.

If you think of a really good reason for doing this, let me know. That's what really puzzles me.