How to tell if someone is BOX SQUATTING or SQUATTING TO A BOX.
If there is a sweat angel butt print left after the squat, the lifter has performed a box squat. If there is no sweat angel butt print left after the squat, you have a lifter who has squatted TO a box.
If you're not sweating profusely like Nate here, you can also try applying a thin layer of chalk to your box and seeing what print is left.
Which are you doing--a box squat, or squatting to a box? Both have their applications.