//Put this OnEnter
void main()
{

object oPC = GetEnteringObject();

if (!GetIsPC(oPC)) return;

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

if (DoOnce==TRUE) return;

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

SendMessageToPC(oPC, "You see something up ahead...  it looks fierce..  horrable..  the very air seems to burn with menace... its not to late to turn back....");

}