Before epilepsy was understood to be a neurological condition, people believed it was caused by the moon, or by phlegm in the brain. They condemned seizures as evidence of witchcraft or demonic possession, and killed or castrated sufferers to prevent them from passing tainted blood to a new generation.
Free will is often defined as the capability to have done otherwise.
…which non-free-will folks will argue is irrelevant. You could have done different, if you had a reason to, but you didn’t.