cstrike

When you reload, if somebody attacks you, press mouse1 (will stop reload) and attack!

Spoiler:

alias rld1 "bind mouse1 rld3; rld2"
alias rld2 "+reload; w10; -reload; mouse1a"
alias rld3 "weapon_knife; w3; lastinv; mouse1a"
alias mouse1a "bind mouse1 +attack"
alias "w3" "wait; wait; wait"
alias "w5" "w3; wait; wait"
alias "w10" "w5 ; w5"

bind "shift" "rld1"