The answer I got back from him today was that he didn't have a seizure, but tripped over his dog's chain and hit the cement. He said his wife was confused, because he used to have seizures 3-4 years ago. He's had a rough life for a 35 year old. He was raised as a ward of the state. He also had a child that was killed by his other son in the new home they were in. The seller asked if he could come get his stuff out of the garage in a couple of weeks, but neglected to tell them he had a sawed-off shotgun hidden in the belongings. His one son pulled it out, and thought it was a toy. He came out to the driveway to see his son's brain all over it. He went into a big drinking binge for years over it, and couldn't function. He takes a drug called Tramadol to help him with back problems. And mixing Tramadol and alcohol can cause seizures. He tells me he used to drink a gallon of whiskey a day to try to forget what happened to his son. He said his wife came out and assumed it was a seizure.
He seemed very believable explaining all of this. I knew about his past, so it all jived.
He's a very good worker, and not the type I'd want to lose (assuming the above is true). I'm very hard on employees. Some people can't keep pace, and others thrive on the fast pace we keep up. When I find the latter, I hold onto them pretty hard. The ones that can't keep up get broomed in less than 45 days (sometimes the same day they are hired, for the really lazy ones).
He's intelligent enough and hard working enough that I could see him taking my role as actively managing the company. I like managing now, but miss the days when I could go to a different city and spend a week. I also miss being able to sleep in until 9AM every day.