When I was ~19yo, we went to a rave and I let a kid I didn’t know borrow my glow sticks. He lost them and gave me caffeine pills to try to compensate me. Cops saw the exchange and made me pull them out of my pocket. I had ecstasy in the same pocket and got lucky that I didn’t pull out the wrong pills (while rolling face).
When I was 18yo, someone tried to rob us at gunpoint for acid we were selling. Cops got involved and bluffed to both me and my roommate that the other had admitted to selling pot and that was the robbery (we weren’t selling pot, so both didn’t admit to anything). The cops dropped the sheet of acid that was hidden in a porno box when they searched our apartment and we found it on the floor.
In either case, I could have gone to prison for enough time to destroy my future.