Once in a while I'm sure that most of us bet on the impossible or ridiculous things just for fun and for the thrills, I'd also say that nothing is impossible especially in betting or gambling as anything is possible. Some I spend money on betting in the most ridiculous things just to see the outcome of it, OPs story shows that even the impossible can happen and it's also a reminder to bet on sports for the fun and not necessarily take it too serious.
That kind of bet is a dead bet already. We can't assume any positive results other than just another loss. Therefore, we have not treated gambling seriously. We always remind ourselves that gambling should be just an entertainment, not the kind of thing to rely on to generate income. Betting should have no regret, whatever the outcome, as we choose to take some risk. Perhaps, winning and losing are just the two possible things that happen. If we win, then be happy, but if we lose, accept it.