At the end, both the "dead" horse and man are seen breathing.
When Steve tells Dan to leave in the helicopter, the pilots door is missing. When it cuts back to the helicopter in the next shot, the pilots door is in place.
Mr. Cronin arrives at Frank's ranch in a 1962 Ford 4 door sedan. After he dies, Frank puts Mr. Cronin's body in the car, and pushes it over a cliff. The car is now a 1963 Ford four door sedan.
When Danno pulls up in front of the police headquarters in the morning, he is driving a black 1966 Ford sedan. A few scenes later at the airport, he is standing outside of a 1969 Ford when he calls McGarrett on the radio.
When the car ends its crash, it is parallel with the shoreline. When discovered via helicopter, it is pointed toward the shoreline.
Lights and a crew member reflected in the helicopter's window.