WWE legend The Undertaker talks about the thought process behind his iconic theme music, and specially the "bong" sound that kicked off his entrance.

Give a lot of credit to WWE's music genius Jim Johnston for coming up with this song. It's hard to imagine Undertaker debuting with something else. It just wouldn't have fit as well as this one did.

The Undertaker made his debut at the 1990 Survivor Series Pay-Per-View. Back then, his music wasn't quite what it would become, but the change was important. Quickly, the WWF added a tolling bell ...

From Survivor Series 1990 to WrestleMania 25 and beyond, check out these Undertaker milestone events that just landed on the Free Version of WWE Network.

Before Kane and The Undertaker battle The Wyatt Family on Sunday, take the time to go back and watch his debut at Survivor Series 1990 on the WWE Network.