There's a man I know that goes to the same swimming pool I do. He spends most of his time sitting on a bench and reading. Sometimes he lies down, basks in the sun, sleeps maybe.
A few weeks ago, I noticed him leaning over a bit, and thought his face looked funny (strange). A bit later, when I turned around, he was still sitting, but laying back with his head hanging back and his arms outstretched to the sides. Suddenly his arms and head and body starting jerking really wierdly, and I realized he was having a seizure.
I got the lifeguards attention, and he looked down from his stand at my friend for a moment, then jumped down and ran to him. Long story short, my pool friend came out of it and told the guard he was "just sleeping" I said "Joe, that was Not jerking in your sleep, you were having a seizure" Other patrons at the pool agreed. He was stubborn, so I simply said "Joe, I think you need to get this checked out" But of course, he's a grown man, and makes his own decisions.
I think people need to overcome hesitancy if they see something out of the norm occur, and step forward to help.