public OnPlayerTakeDamage(playerid, issuerid, Float: amount, weaponid)
{
       new Float:x, Float:y, Float:z;
       GetPlayerPos(playerid, x, y, z);
       CreateObject(18668, x, y, z-2.5, 0, 0, 0);
       return 1;
}

Szerintem erre gondoltál:
 

public OnPlayerTakeDamage(playerid, issuerid, Float: amount, weaponid)
{
       new Float:x, Float:y, Float:z;
       GetPlayerPos(playerid, x, y, z);
       CreateObject(18668, x, y, z-2.5, 0, 0, 0);
       return 1;
}

 

igen asszem