void main()
{
    object oPC = GetEnteringObject();
    int fallDmg = GetLocalInt(oPC, "di_falldmg");
    if( fallDmg > 0)
    {
        DeleteLocalInt(oPC, "di_falldmg");
        SendMessageToPC(oPC, GetLocalString(oPC, "di_fallstring"));
        ApplyEffectToObject(DURATION_TYPE_TEMPORARY, EffectKnockdown(), oPC, 3.0f);
        ApplyEffectToObject(DURATION_TYPE_TEMPORARY, EffectDamage(fallDmg), oPC);
        DeleteLocalString(oPC, "di_fallstring");
    }
}