It's always cool learning how stuff works. Case in point: cameras. More specifically, digital single-lens reflex (DSLR) pictograph boxes. The chaps over at YouTube channel The Slow Mo Guys have taken their trademark ultra-high-speed camerawork and, well, pointed it at a camera. The result? Seeing what a shutter looks like moving at 1/8000 of a second compared to 1/1000 of a second. Host Gavin Free achieves this, like the rest of the team's pretty rad videos, by shooting at 10,000 frames per-second with a Phantom Flex and then slowing it down for playback. The video below isn't the channel's most impressive clip, but it's perhaps the one with the most useful knowledge. After all, how often will you watch the result of chugging a gallon of milk as opposed to seeing just what happens when you snap a picture? Exactly.