The MIT media lab researchers have created a camera which captures at a shutter speed of one trillion frames per second, meaning it can actually record the travelling of photons of light between points.
The team hit the breakthrough taking a picture of a laser beam as it passed through a fizzy drink bottle, using a sophisticated system with a modified Streak Tube to intensify the photons and a pretty beasty-sized camera. The footage that was captured required multiple hundreds of takes of the same experiment, creating quite a beautiful stop motion film of multiple beams of light reflecting through the bottle, collecting in the cap and dispersing. It's gained the rather oxymoronic nickname of "the world's slowest fastest camera" due to the extremely quick shutter speed, contradicted with the slow image processing time. Take a look at the video below to see it in action.