Okay, but when's the last time a piece of real estate ran over a child? I'm being a bit drastic, sure, but we're talking about a mobile, several thousand pound object. As your link shows, the notion of casaulty with respect to liability still engages the owner / lessor with obligations with respect to legal standards. The NNN lease may exist, but it's not a very palatable notion, IMO, especially when applied to something like a vehicle.

A running over a child equivalent would be falling down unexpectedly or a small portion caving in.

When I was 7, all the bricks in one corner of the kitchen fell down. Just randomly (probably decaying, but unnoticed because of the paint) The lady taking care of me was less than 5 feet away.