How does one become:  happy?

We watched this video in class earlier on Monday.  
It seemed like it made sense, but I've seen Mythbusters.  I know that to see it on Youtube is one thing, but to see it in person is completely different.

So what's our Extra Credit?

    Tell someone you're grateful for them.  It must be Unsolicited!  (They shouldn't be "asking" for it.)  Try writing what you are going to say in the poem in the box below!