If I remember it correctly, my gambling mistake cost me 500 bucks. I have lost a bet and immediately made another hoping if I win it would cover my losses. Such a casual newbie mistake, a thing that everyone knows not to do, but emotions lead me to making that stupid mistake. I think years have passed since then, but those two huge losses in less than 10 seconds that has come one after another stuck in my mind Btw, I wish that this failure to stuck in mind for a very long period as a reminder and prevent making similar mistakes in future.