Smoking the herb for the first time at my mates place, one joint and I was already fucked. He leaves to go to the shop, I get a call from him. He asks me for some money. Through the power of stoner logic I conclude that he was getting mugged, so I run out of the front door without closing it and start running.

The greatest thing about weed is that you are able to laugh off paranoid moments like that, and chill out again, even if it happened mere minutes ago.