CS 1.6 - de_nuke edge bug & more

this clips shows me edge bugging on de_nuke. also a quick way to get across rafters and a way to drop floor with minimal damage taken.

[timo]

you dont leave W in the air. You run forward and start holding duck in the air. in short it goes like this:
1-Strafe to the right so you hit the bar.
2-walk forward until you sweetspot
(m4 you barely see smaller box while standing
knife/pistol/grenade see the middle between bigger boxes while ducking)
3-run straight towards the opposite wall
4-while in air, start holding duck and never let it go
5-You notice youre in the ground, opponents wont hear a sound and you dont lose hp

[awdawd]

at the edge bug with usp, i go at the same place excactly...but i think im doing something wrong with W, when i leave W in tha air? or??