HelpCOD 4 unknown bind

2 months ago i saw a very nice bind, my friend shot a player with that bind and after shot player flew, he told me u must be logged with rcon password to use that bind, but he doesn't remember that bind, we played on promod server

If u know i am talking about tell me what a bind

I hope you understand me and sorry for bad english

bind * "rcon g_knockback 25000; +attack; -attack; wait 50; rcon g_knockback 1000"

You're welcome.