 Shawn Michaels later vacated the WWF World Heavyweight Championship on the "Thursday Raw Thursday" special, where he gave his now-infamous "lost my smile" promo, citing knee problems as his reason to abdicate the title.Due to this and the controversial situation over the Royal Rumble ending, Stone Cold Steve Austin, Bret Hart, The Undertaker, and Vader were pitted against each other at in a Four Corners match for the WWF World Heavyweight Championship, which saw Hart win the vacant WWF World Heavyweight Title.The next night on "Raw", Austin interfered in a WWF World Heavyweight Title match between Hart and Sid, causing Hart to lose the title after only one day.