[meatloaf]

I saw a steel coil on the turnpike that did just that. It went through the Jersey barrier like it was nothing. It unwound enough to block both East and West bound lanes. Fortunately it didn’t hit any cars.

[Paladin2]

Even smaller things can be a problem. A set of semi dual wheels separated from the truck, left the highway and hit a house. Almost got a guy on the john at home.

A single wheel-tire from a light duty vehicle got loose, crossed the grassy median and hit a minivan head on. People died.

It IS dangerous out there.