Let's share our biggest winning odd.
Last month I won a bet with 7.5 odd.
I bet on Tennis against Rafael Nadal.

Heresy!!
Sorry, my patriotic streak comes out.
I remember that I was very close to win a bet with a 18.0 odd once. It was a pass between two players that should've ended in a goal. The pass happened several times at different moments of the game, but none of them ended in goal, even if in several occasions they were very close to. I thought to bet 50€ in order to get 900€. I finally let myself be carried away by reason and bet 10€ for 180€, still not bad, which I lost, but I remember that it made the game more exciting.