Yes, back pain is bad. God knows I've suffered with it for many years, it is not fun. But I've never even thought of rushing myself to the hospital over it. This is obviously either the freak trying to garner sympathy by playing up a back injury, or a flat out lie. And I am leaning towards the second opinion.
IMO, Jackson was hoping to "call in sick" in hopes that the judge would excuse him for a medical reason, and Jackson's plan backfired. Bet he was shocked to learn the judge wasn't buying it. Wonder if Jackson's mommy offered to send a note with him?