I've seen it mentioned periodically, but Bam's brain injuries have got to be a major contributing factor to his drug abuse. On top of that, family members on his dad's side suffer from mental illness.
If you watch this at slow speed, there is no way he didn't injure his brain from the impact and the brain recoiling into the back of his skull for a second impact. This is just one of the times he's hurt his brain, but it's lowkey one of the worst instances of it. It's crazier when you realize he did it on the BOXSPRING and not the mattress.