Any loss of consciousness requires the person to be taken to the emergency department by ambulance. There's no debating this--this is SOP for anyone trained in trauma medicine. But since you made it home alright, I don't know if you were "injured" by this decision, so I don't know if a lawsuit is winnable (or even warranted).
The glass beads are a different story altogether. Someone needs to pay for that, either through improper use, training, or sheer negligence.
I'm not a lawyer and I'm not sue happy. This is not being sue happy--you deserve to be made "whole". Your insurance company (if you have one or one that covered this accident) would be happy to sue to get their money back.
Call your local bar association for a referral.