I was doing my experiment, my project, and the first time it worked great. But the next time it didn't. I mean, it sort of worked, but then it didn't. And I don't know why.
Then maybe you never really understood it the first time. People think science is here [pointing to head] but it is also here. [pointing to chest] The first time, did you love your experiment?
Yes.
Ah. And the second time?
No. I just wanted it over.
Then you changed the variables.

