A major star from the world of rock music was on hand for WWE Money in the Bank this past Saturday, as Tool guitarist Adam Jones was spotted at the sold-out event in Inglewood, California. Jones, a longtime wrestling fan, was there to witness his own musical work come to life as part of a major WWE entrance, a moment he later described as a dream come true.

The Grammy award-winning guitarist recently collaborated with WWE to create new entrance themes for the popular luchador brothers, Penta and Rey Fenix. At the event, Jones posted a video of Penta's electrifying entrance, which prominently featured his signature guitar work.

The experience for Jones also included a backstage meeting with WWE Chief Content Officer Paul "Triple H" Levesque. In a humorous exchange, Levesque joked that Jones "drove a hard bargain" during the negotiations before handing him a single dollar bill as a royalty payment.

For Jones, the collaboration was clearly about passion over payment. He took to his Instagram account to express his gratitude and excitement over the project.

"It was SO damn LOUD at (sold out) #MoneyInTheBank in Inglewood, Ca," Jones wrote. "What an ultimate experience it is for me to cross off 'collaborating on music with @wwe' on my bucket list. Thank you Paul 'Triple H' Levesque, Rey Fenix, Penta."

When the themes first debuted last month, announcer Michael Cole made sure to highlight the significance of the partnership to the global audience.

“You’re hearing a new version of Penta’s theme featuring one of the greatest guitarists of all time, Adam Jones from Grammy award-winning band Tool, using a specific playing technique that has been heard since the early ’90s and around the globe,” Cole stated on commentary.

 We still don't know what this guitar technique is, but one day we will find out!

10 Infamous Receipts in Pro Wrestling History

In pro wrestling, a "receipt" is an ass-kicking that you brought upon yourself. It comes from the cardinal rule of the business -- always take care of your opponent. If you fail to do that, the repercussions will fall squarely on your head (often via chair shot).

The Undertaker recently explained the purpose of giving receipts in wrestling. "I'm pretty patient [when it comes to giving a receipt]. It all depends on intent," the Deadman said. "Some guys just work very snug. I pride myself on my punches. I feel like I can make it look like I can take your head off and not touch you. Every once in a while one gets away from me... I'd much rather it be there than it miss. It ain't ballet."

But not all receipts come after a stiff shot gets away. Sometimes a performer delivers a receipt to protect themselves from an unsafe worker, like when Taker had to shut down Giant Gonzalez at Wrestlemania IX. "[Gonzalez] cracks me right across the back of my neck, and then once I get back the feeling in my little fingers... I flipped," Taker recalled on his podcast. "I turned around and just started wailing on him."

Let's go back to classic WWE, the old territories, and even a battle between monsters in Japan. Here are 10 of the most infamous receipts in pro wrestling history.

Gallery Credit: WWE / NWA / HWA / YouTube