A member of the public banged their head on the ride when it stopped unexpectedly. They looked OK but went off to hospital for a check up anyway.
Yes. You must report cases where a person not at work is injured due to an accident that arises out of or is connected to your work and is taken from your premises to a hospital for treatment. However, if they tell you later that the hospital could find no injury, not even a minor cut or abrasion, then you do not have to make a report.