He said: "I really don't know what happened. It was one of those things where the planets were aligned, perfectly or imperfectly. I said some stuff and then it caught such traction globally and instantly that I couldn't really put out the fire.
"From one moment to the next, I didn't know what was going to happen. It was pretty exciting."
At one point Charlie became famous for drinking a mysterious concoction known as Tiger Blood, and that period is one he admits is "silly".
He added: "Looking back on it, I don't think I would trade it, but there are portions of it I would have amended a little bit. I don't know, the Tiger Blood thing, it was so silly and people took it so seriously and I figured, alright, I'll continue to give the people what they want, you know?"
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