Just Being Thorough is an in-game achievement in Run 3.
We recommend to use slower characters, such as the runner or the lizard. There isn't really much of a technique to this, just try and time your jumps while trying to dislodge all of the crumbling tiles. You can watch the video if you need more help.
A very helpful tip is to get a definite strategy. This will make the achievement much easier. You can use the route Random Pro used or make another.