Veteran Channel 4 journalist Jon Snow recently inhaled 'skunk' cannabis as part of an upcoming Channel 4 show, and he didn't enjoy it at all.

Admittedly a novice when it comes to the drug - he admits to having smoked it about a dozen times in his life - Snow begins to feel "separated from [him]self" after inhaling two significant doses of cannabis vapour.

In a blog post he describes the experience:

"What was happening to me outstripped anything I have ever experienced...

"By the time I was completely stoned I felt utterly bereft. I felt as if my soul had been wrenched from my body. There was no one in my world. I felt I had lost all control and had only the vaguest awareness of who I was and what on earth I was doing.

"I cascaded into a very, very, dark place, the darkest mental place I have ever been. I was frightened, paranoid, and felt physically and mentally wrapped in a dense blanket of fog."

Despite his extensive war reportage, Snow says the high left him more frightened than he had ever been. It did, however, become more pleasant towards the end of the four hours:

"Just toward the end I felt a sense of euphoria and expressed it by drawing a pastoral scene on an old box that was lying around in the lab. I drew trees, a fence, a river, and a couple of people – perhaps the very people, trees, and water, that I had felt so deprived of whilst stoned."

Channel 4's Drugs Live will air on 3 March.