I need help with corner glitch

I cnt corner glitch no matter how hard I try

I jump on very edge (crouched)
then jump again press w and s
stand walk In center and press croutch

but never work can som1 teach me? R give me a tut?

AND, you don't have to crouch. Instead hold shift. I found out, that that way is better for meh. Try it NAO!

You can corner glitch on all corners but some of them slowly drain your health, watch out.

I can do it but cant fall in boxes?