Those are not "real trikes", for sure, skuuter. Nor are those old Honda 3-wheel ATVs. We used to have 3 of them, and Mike, myself, and the kids tore all over our 65 acres like maniacs.
Ours were flipped (waaaaaaaayyyyyyyy to easily), tossed into trees and fences, and went swimming in the pond ---
when piloted by Mike. I'm amazed he is still alive, he wrecked those things so often! The kids were kept on a "short leash" as the only one they were allowed to drive had a speed governor on it. My personal leash was that I didn't like that feeling of the rear wheel lifting, so I'd back off. Besides, I figured the kids needed at least one parent around.
There are people who had similar experiences, and who have fear of the "real trikes" as a result. We met a man like that just recently in a gas station. Not sure we ever convinced him of my trike's stability. Well.... maybe when I peeled out of there and shot off down the street and around the corner.........