Slow Mo Guy's Lab Coats

Origin
The Slow Mo Guys was originally the idea of Gavin Free who was using high speed cameras for movies to shoot slow motion. In order to get an actor's Visa to get into America Free started an online web series with his childhood friend Dan Gruchy. The pair shoots several videos of high speed objects with their high speed camera. They would record things like a gun shooting underwater then play it back in super high speed which slows down the recording. More often enough Gruchy would be the test subject when they show paint exploding or being shot with a pudding cannon which is why his lab coat is often in disarray.

Effects
Anyone who wears them will move fast but speak slow.