on damage of a player:
    set {lastAttacker::%victim's uuid%} to name of attacker

on death of a player:
    if event-damagecause is void:
        if {lastAttacker::%player's uuid%} is set:
            send action bar "%{lastAttacker::%player's uuid%}% vous a poussé dans le vide !" to player
            clear {lastAttacker::%player's uuid%}
        else:
            send action bar "Quelqu'un vous a poussé dans le vide... o.O" to player