"Brad stared through the dirty soot-smeared window on the 22nd floor of the office tower. Overcome with depression he slid the window open and jumped through it. It was a sheer drop outside the building to the ground. Miraculously after he landed he was completely unhurt. Since there was nothing to cushion his fall or slow his descent, how could he have survived the fall?"
You were "Rickrolled" :-)***
By the way... The answer to the riddle was: "Brad was so sick and tired of window washing, he opened the window and jumped inside."