Interlaken, Berne, 21st century.
Several things happen after the car hits the rock.

Tiff ceases to be pregnant. Stephen captures, like, the most wonderful bird - fleet, stealthy, and beautiful - a real "lifer".
And the wallcreeper, the wallcreeper says "twee". 

The Wallcreeper is nothing more than a portrait of marriage, complete with all its requisite highs and lows: drugs, dubstep, small chores, anal sex, eco-terrorism, birding, breeding and feeding.