"Time is going by really really really really slowly."
Has this ever happened to you?
If it has, you really really really really should not do it again. Maybe it's a sign.
I personally don't use drugs, but I know some people who "indulge" in that pass-time. And many of them have freaked out more than once during their "recreational career". And I still get amazed when they realize how stupid they seemed, or how bad they freaked out, and STILL keep using.
"Remember that time I thought my eyes were bleeding? And I wanted to pour alcohol directly in my eyes? That was freaky. I really could have blinded myself. I hope that never happens again. Alrighty, I finished rolling this fatty. Let's spark this shyzz up!"
Honestly, I can understand someone thinking that first time was a fluke. But when you've freaked out at least five or six times... It's time to try something different.