When asked about his fondest memory of Senna, Dennis mentioned a bet he won.
"He gave me an envelope once, I still have it at home," Dennis said. "The envelope's been opened, but when he gave it to me it had $10,000 in it, the result of a bet we made that I could not eat a container of chili in Mexico. Before he could pull the bet back, I wolfed it down. That was about the fourth time that he had lost a bet, a big one. And I can remember him giving the envelope of money to me, and saying he was never going to bet ever again, that I'd got him into betting and that it was not a good thing to do!