I was so sure my test would work, I told my boss I'd jump off a cliff if it didn't. At the time, I was working as the product growth lead at The Black Tux, an e-commerce company that sells and rents tuxedos. My task was to increase conversion to purchasing and renting. We had a lot of eyeballs coming in, but not so many opening their wallets. It was my job to figure out why and to fix it.