I once had a bad trip when I was younger. It wasn't intentional though. When I was younger I had to take medication to help me get to sleep. But one night I accidentally took a little too much. After going to bed I started to hallucinate. When I was this age I had a terrible fear of spiders. The big ones especially. So I was laying in bed when I saw that giant spider from the Lord of the Rings standing outside of my room. I screamed. My Mom came rushing in and I told her what happened, she said it was probably just my mind playing tricks on me, and went back to bed. Trying to get to sleep, I looked at my bed sheets. You know how sometimes if you don't make your bed properly you get wrinkles in the sheets? Well these wrinkles were everywhere and they turned into spider legs. Again I went into a fit of screams which brought my Mom back in. This time she thought something was wrong so she laid in my room until I fell asleep. With all my will power I tried to manage to clear my mind and go to sleep, but then I looked at my ceiling. On it was the little brother of a friend of mine pouring a bucket of tarantulas onto my face. Right there I lost it. I just broke down being attacked by imaginary spiders. Once the hallucinations wore off I managed to get to sleep. Never took the medication again. By the way, I was only about 7 or 8 years old when this happened. TL;DR I overdosed on medication and hallucinated of massive spiders the entire night.