is the one at the car races.

I think it's called tyrannosaurus or carosourus or something, picks up cars & crushes them, and spews out flames from its nostrils.

It pleases the crowds, makes money, making it immensely practical!

And it's GUY COOL!

I also liked the giant mech on robocop (3?)
Ok, they went berserk and killed people but would be great to have some of these guarding my ranch...