There are likely many things that can cause a seizure. Sometimes diabetics can have seizures, if their blood sugar levels, or insulin levels get out of normal range. For instance, I once rented a house to a 60 year old lady who told me she was rushed to the hospital, because she had a seizure, and said she was flipping around on the ground.( out of control) A neighbour saw her and called an ambulance. She told me because she was a diabetic, if her blood sugar levels are not right, or insulin levels, that this can happen. This is just one example, and I'm sure there are many other things that could cause this -- like epilepsy, or your fluid and electrolyte levels get out of range, like happened to my sister. So there are "many" things that can cause these things, and I'm not a medical person by any means, but I just cited a couple of real life examples, I've seen happen in real life.
I just hope it's nothing too serious for Rick's wife, and that it's a manageable condition, and that she can recover quickly and get well, and maybe medication to prevent reoccurence. I wish the very best for Rick Bowness and his wife. I'm sure they know right now what it is.