Is it the way young children seem to go into a trance watching it?
Is it because of the repetitive rather nonsensical, trippy songs and "dumbed down" *cough* educational content?
Is it because, as Steve reckons, that D.J. Lance Rock in the scary orange wig-hat is hatching the first stage of his world domination plan and in twenty years, when all these kiddies are in their early adult years, when he flicks a switch there'll be an uprising using the brainwashed Yo Gabba Gabba legion of toddler fans?
All I know is, there is something about the whole thing that even makes me kind of come over glassy-eyed, with its white backdrop sets and bright colours and spinning monsters repeating the same 3 or 4 words over and over. And if I have to steel myself to look away.... well.
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Be scared. Be very, very scared.