[Xyrex]

You are right, It can be solved with a boolean variable.

pawn Код:

public OnPlayerUpdate(playerid)
{
    if(booleanvaribale){
        if(health <= 29) {
            ApplyAnimationEx(playerid, "CRACK", "crckdeth2", 4.0, 0, 1, 1, 1, 1);
            booleanvariable = false;
        }
    }
}