I'm not sure, but I know there is a some sort of anachronism in the sequence. If Splash Mountain is shown, that would be it -- certainly didn't exist during the period the movie is set. But maybe it is that the configuration of the cars on the Matterhorn changed, and the movie shows the version current at the time the film was made, which is wrong for the era depicted.In That Thing You Do, they take a trip to Disneyland, but the montage is literally less than 20 seconds. If I remember correctly (it's been a while), it's something like some screaming on the Matterhorn, then down Splash Mountain, and then a picture with Mickey.