Its imposible to hit someone 6 times in the air. ESF has a limit of 2 hits. Unles he was useing the bug and hiting you into the ceiling of the map so that you bounced off and than hit you again. But thats an exploit.
As for the bind command its ussed to bind values to keys.
bind "g" "+powerup"
That makes you recharge your KI when you press g.