Still laughing my ass off while I try to put this together in my mind.

Ever lift one of those cover? It takes a pretty good amount of strength to remove a lid. Most times you have to drag the cover away from the hole.

Now if I stood on it and one side fell in, there's no way I could fall into the opening. If he's saying the entire lid fell into the hole, I would again question how that cover ever stayed up after all those cars hit it.

Sorry, I call BS.