IIN for me to have supernatural powers that change every 3 years?

I'm just the same. When I was a kid, I saw a TV show about a man who went green and well-muscled and ripped all his clothes every time he got angry. Then I told everyone I do the same even though there's no evidence at all to support it and the only time I've ever gone green is when I went on a fairground ride after a particularly wholesome repast.