To compensate for his lack of physical activity, Undertaker became more vocal on the mic, often making smart-aleck remarks and performing commentary. On the September 23, 1999 episode of "SmackDown!", Mr. McMahon threatened that he would remove Undertaker from the Unforgiven main event if he refused to participate in a casket match against Triple H. Undertaker retorted that he did not care and maybe he would not be participating in anything, thus walking out of the WWF.&lt;ref name="WWF SmackDown! - 09/23/1999"&gt;&lt;/ref&gt; In reality, Calaway went on a hiatus from the WWF in order to treat his groin injury. He made his return to action on December 14, teaming with Viscera in a losing effort against Kane and The Godfather at a house show in Coamo, Puerto Rico. The Undertaker was advertised on the Armageddon promotional poster to return, but meanwhile also tore his pectoral muscle, making him take almost eight months out of action.