Having been outside at high elevation from 8:50pm to 10pm, 10:50pm to midnight, 12:50am to 2am and 2:50am to 4am, I have a few observations: Time goes faster if you watch the skies, not the clock. The clock also exhibits a pronounced lack of shooting stars. Wearing warm outer layers indoors will make you colder outdoors. Airplanes move relative to the stars. Stars don't. Airplanes blink. Stars near the horizon twinkle visibly. Stars at zenith (here) do neither. Any electrical or electronic device, no matter how expensive, has its peevish moments. Never underestimate the value of free snacks.