How to do Corner glitch

Iv seen to many ppl saying i dont know how to do corner glitch/i cant do it
heres my simple tut on it

1.find a corner
2.stand on edge of corner
3.jump
4.press A+D or W+S ( A+D is easy for me )
5.when you sink into the corner start runing if it starts jiggering your good
6. when jiggering is done run and crouch
7.if your lossing 20hp a sec then start jumping or get out of there
8.if your not lossing HP crouch there and start owning noobs

Press Thanks if i helped

old already posted... & A+D isn't easier if your just learning....