I wish I was joking about this, but my brother got me to be absolutely terrified of rainbows to the point that as a kid I'd run in my house crying if I saw one... here's how he did it: One night he told me that whenever a rainbow would come out, G.I.Joe's, Smurfs, and Transformers would climb down the rainbow and basically terrorize everybody... I even had nightmares about rainbows which ended up with me screaming in my bed!