Falling

[Phenom]

Is it possible, to avoid damaging, when the player falls down from big height? If yes, how? Only for fall damage, not weapons.

[DiSaMe]

Cancel the event only in certain conditions. I don't know what the attacker and weapon would be shown in the case of falling damage, but you can try outputting them and then use those conditions.

[SDK]

According to the Killmessages resource, falling dead is weapon ID 54:

Clientside:

function stopFallingDamage ( attacker, weapon, bodypart ) 
    if ( weapon == 54 ) then 
        cancelEvent() 
    end 
end 
addEventHandler ( "onClientPlayerDamage", getLocalPlayer(), stopFallingDamage )