- The Undertaker's debut back in 1990, which signaled a major paradigm shift in the way sports- entertainment would be presented in the years to come. As cheesy as the gimmick may seem nowadays, in the candy-colored circus that was WWE during the Reagan/Bush era the 'Taker gimmick was unique - and frightening. His theme, "Dark Side", was in the beginning much less elegiac and a lot more minimalist and creepy - literally like the music played in a funeral home chapel. 'Taker also never spoke and literally tried to kill his opponents, usually by choking them. Add to that Paul Bearer's pasty white skin and unnaturally high voice, and it was undeniable that the Undertaker's appearances truly were something to fear.
- Scott Keith even admitted that the crowd reaction at Survivor Series'90 was something very unprecedented..and if you look on the faces of adult fans in the crowd, legitimate fear is very visible. No one knew what to make of this.
- Anything that involves his "return" after being "buried alive".
- The Undertaker's theme is considered Nightmare Fuel due to it beginning with the loud eerie ringing of a church bell like the beginning of AC/DC's Hells Bells but scarier, then crescendoing into the creepiest rendition of Chopin's Funeral March ever, and the rest of the music sounds like something out of a Resident Evil game. Scary enough for ya?
- Undertaker locking Ultimate Warrior into a casket. Even worse, it went on and on, with various officials trying (and failing) to get Warrior out of the casket. When they finally did, it was revealed that Warrior had torn up the coffin in a desperate attempt to get out. Creepy stuff for a show aired on Saturday afternoons.
- Made even worse with the Ultimate Warrior's sudden passing at the age of 54. And the Warrior once said that he would die once he saw Undertaker's streak ended...which it did two days before his death.
- Anytime he pulls people down below the ring. He once did it to Kane, his half-brother, and the look on the Big Red Machine's face was of pure agony.
- The Tombstoned magazine special with the cover of him looking like a corpse in a coffin. Some sellers were given the heebie jeebies about it and expressed concern over its sale.
- Three words: "Where to, Stephanie?"
- Three more words: "Buckle up, Teddy."
- His mind games with Randy Orton leading up to Hell in a Cell at Armageddon '05. Ranging from appearing in a mirror than vanishing, pretending he was a wax figure in an open coffin before choking Orton, possessing Josh Matthews....the list goes on and on.
- His feud with Ken Kennedy in 2006. The lead-up to their First Blood Match in Survivor Series has Undertaker state their match...and then blood starts raining down on Mr. Kennedy not unlike Gangrel's blood baths. Then, lead-up to their Armageddon Last Ride Match has Undertaker—who was about to be run over by a hearse—somehow teleporting to the passenger's seat of said hearse.
- During his Bikertaker days, Taker had no problem giving out beatdowns to people. Some examples include:
- Getting Ric Flair's attention by pulling his oldest son, David, into a locker room and proceeding to beat the tar out of him. One line in particular toward the end of the segment really sticks out:
- Attacking Jeff Hardy after he's been handcuffed to the ropes, while Raven forces a horrified Matt Hardy to watch.
- This one has been covered in the CMoA territory, but Undertaker's alleged threat to Shawn Michaels that he had better lose the championship to "Stone Cold" Steve Austin at Wrestlemania 14…or else. Considering Taker was sitting backstage watching the match with his fists taped, one gets chills thinking of what he would do to Michaels. Consider that Undertaker is seven feet tall, and over three hundred pounds of angry muscle...
Nightmare Fuel / The Undertaker
Considering that he's "The Deadman" and all, along with having a 20 year career in WWE, The Undertaker is all about the Nightmare Fuel, and has racked up quite a fair share of it over the years.