Watch a pulse of light at a trillion frames per second

So, at MIT they made a high speed camera that can capture a trillion frames per second and that's fast enough to watch a pulse of light in slow motion. Crazy. How did they do this, you ask? They use a bunch of light sensors that are slow on their own, but are timed to take a picture one trillionth of a second apart. To reduce the number of sensors that they needed to use they took photos that were only about a pixel high and as wide as their scene. Then scanned the whole scene from top to bottom with the camera. Since the light pulse was a highly repeatable event, they could do a bunch of trials and then mesh all of the line videos together. I JUST SAW LIGHT! Yeah, whatever, I see light 16 hours a day.