Is flash step patched?

I know the bugs but I've no idea how you people call them... some years ago I had found a video showing up different glitches, including the solo and team low FPS bug.. just search for 'crossfire fraps bug' or something like that (you could use bandicam too, as some recommended me before).

As far as I know, the only way to do low FPS corner glitch is forward , from upside corner's edge of a cubic (or similar) object (a wooden box or a metallic one, a concrete cube, a hay package, a corner of a level from the ground, etc.) to downside in, so... you must be upper tan the object sometime while doing the glitch, not like a wall's corner, where you have more wall upside your self (that's why it pushes you a side).

There's a low FPS Wall glitch, where you 'jump crouch' on your teammate, like you would do in the corner, then you get thrown so fast inside anything is in front, I guess this is the one you call flash step... by the way, I have never done it successfully before.

what is that

A glitching style, like I explained