Mine was horse racing I betted in a winner take all where you bet on the winner of the seven races I won all six and I'm down to the last horse who is a heavy favorite but unfortunately it did is not deliver when it matters most, the other 6 horses I betted some of them are not favorite to win but they win eventually, it's crazy it's weird I could have won the jackpot.
It's common mate. That's not a weird bet but it's about your experience as your expected outcome just didn't go the way you want or you got surprised.
OP is pointing out a specific game bet that is not usual I guess.
I can't remember some of the unusual bet I made in the past but this one might fit the category of being weird:
https://www.sportsbettingdime.com/news/sbd-props/odds-covid-vaccine-released-pfizer-2020-betting-longshot/It's the vaccine race again the Covid-19 virus.