lol this story has always sounded funny to me, because the way Chris describes it, it's like he was just sitting there doing his school work when they all just grabbed him, held him down, and recorded his screams simply because they feared the power of his atsimu. It's similar to his version of the Michael Snyder van incident where Snyder was "rubbing his legs on the van to pretend he got hit" or whatever.
I'd wager that Chris was prone to emotional meltdowns (~40 years old, hedgehog defense at the My Little Pony show, videos of himself yelling over being blocked on twitter), he had to be restrained and maybe they recorded this for some sort of documentation of his behavior or liability reasons. I'd actually think it was probably recorded on video vs a cassette tape, but just lol @ him continuing to insist they just randomly wanted to make a cassette recording of him screaming one day.