Well, not a big deal. But maybe it would be useful in some situations ^^.
map: aim_awp
a deal: You can step on destructable groud and you won't fall down and kill yourself.
Ye, in that map, if you want to come near your enemies you gotta jump over these grounds fastly or use bunny hoping or something, which is risky. Don't do that. Just cross these grounds normally.
Step on these ground and just cross the field:
As I said, it's not a big deal and maybe it's old, but I used search and there were no results in searching. ^^
Here's the vid.:
http://rapidshare.com/files/172458088/MXC.rar (uploaded from my premium RS account, download as many times as you want)
Good luck.