When the staff and patients are loading up to go on their picnic, two of the cars are 1955 Cadillac Fleetwood 75's. When they arrive at their destination, the cars have changed into 1958 and 1959 Cadillac Fleetwood 75's. The station wagon has changed from a 1959 Ford Country Squire to a 1960 Ford Country Squire.
When Stephen is clinging to the rocks his eyeglasses disappear then reappear.