The wheels on Jerry's crashed Porsche are different to the ones on his car when he first arrives at Jimmy's house.
When the two hikers see Jerry's car from the road they move towards the cliff edge and stop at a large X scratched into the soil.
Sandy visits Joe Dalhousie at home, enters by the front door and standing at the bottom of a staircase looks up the stairs and calls to Mr Dalhousie. From outside the building was single story with a flat roof.