void main()
{

object oPC = GetLastUsedBy();

if (!GetIsPC(oPC)) return;

int DoOnce = GetLocalInt(oPC, GetTag(OBJECT_SELF));

if (DoOnce==TRUE) return;

SetLocalInt(oPC, GetTag(OBJECT_SELF), TRUE);

ActionSpeakString("A horrid stench wafts from this room, where the humid heat seems to have its source. In the semi-darkness you see piles of debris. The debris hole is at least 20 feet down.");

}