Automobile than this engineer does a train. so going two miles an hour over or under isn't particularly egregious. >> is there anything you can tell from just the way the cars landed, the way that they are now configured? and we see some that are down and on their side and then some that remain upright and partially over? >> conventional cars, depending on the speed -- high speeds tend to what they call accordion. these cars are connected differently. like i said, they're articulated so it's almost a semipermanent connection between the cars. these are relatively -- remain in a relatively stra...