the bikes
when rex was looking for saskia shortly after she disappeared he said something about their bikes and then he booked it to the car, whereupon he learned the bikes were missing.
because i enjoyed the film without understanding the bikes scene i'm guessing it had no significance. however, i'd still like to know (1) what caused rex to think about the bikes in relation to his inability to find saskia and (2) where did the damn things go anyway?