Probably when i at one time hit the MAX on the casino slot, so instead of spin for 1 usd i spin for 100usd, well if i would won, it would probably be my best memory:) but i didn't 
It's fine to lose $100 and that's an acceptable amount while others are even losing thousands of bucks that's totally memorable to them. This is your worst and learn from this mistake that you did, if you ever won make sure that you'll set aside a portion of your profit if you want to continue.