void main()
{
object oPC = GetEnteringObject();
object oInv = GetObjectByTag("by_iwd_fallmsg");

if (GetIsPC(oPC)== TRUE)
    {
    int nDex = GetAbilityModifier(ABILITY_DEXTERITY, oPC);

    if(nDex + d20(1) >= 30)
        {
        SendMessageToPC(oPC, "You manage to avoid the opening trap door!");
        }
     else
        {
        object oDrop = GetWaypointByTag("fr_iwd_ogre_cave");

        string sName = GetName(oPC);
        int nSex = GetGender(oPC);

        string sSex;

        if(nSex == 1)
            {
            string sSex = "her";
            }
        else
            {
            string sSex = "his";
            }

        string sFall = "[The ground under " + sName + "'s feet opens suddenly!]";
        AssignCommand(oInv, SpeakString(sFall, TALKVOLUME_TALK));
        SendMessageToPC(oPC, "The floor suddenly moves bellow you and you fall into a pit.");
        AssignCommand (oPC,JumpToObject(oDrop));
        }
    }
}