 It probably happened when I was a graduate student and was studying things and I realized that I really enjoyed learning and working with other people who also enjoyed learning and studying things. And then from one or two experiments we did, they actually worked out. They had failed previously and then I realized that failing in things is really important than to guide you in what you do subsequently. And I think probably then is when the light went off, this is really fun and I think I would enjoy doing this and I'd like to do more of it and see if that's true.