Missouri Boy, 10, Takes the Stage With Foo Fighters, Then Helps Sick Friend

Dave Grohl gave the 10-year-old his big blue Gibson guitar.

How amazingly cool is that?

Ten-year-old Collier Cash Rule took the stage at the behest of Foo Fighters frontman Dave Grohl and shredded it in front of thousands of screaming fans in Kansas City, Missouri.

And he didn't even play one of the band's songs. He had the audacity to play Metallica's "Enter Sandman," which tickled Grohl to no end. The rock star threw up his hands as Rule blistered off the opening chords. Then the kid strutted around the stage while Grohl growled out the lyrics to one verse and the chorus. 

"That's all we know!" Grohl shouted. "He knows more than we do!"

Rule had gone to the show with his mom, Jennifer Dlugolecki, and a friend. With Mom's permission, the avid guitarist and his pal pushed to the front of the stage, where Collier was madly playing air guitar when he caught Grohl's eye.

The lead singer summoned the boy on stage. After telling the rock god his name, Collier was asked if he knew how to play the guitar and what songs he knew. 

"I know a lot of Metallica songs," he piped up as the crowded burst out laughing. Then Grohl's big blue Gibson was strapped across Collier's neck, hanging nearly to his knees.

Collier had no shortage of cheek under the spotlight. After "Enter Sandman," he played snatches of Metallica's "Welcome Home (Sanitarium)" and "Wherever I May Roam."

"That was awesome," Grohl said. Then he looked down and pointed to the baby blue guitar cradled between Collier's arms. "You wanna keep that?" Grohl asked. Overcome, the child's stage persona cracked a little as he reached out and hugged Grohl.

 "It was really exciting," the boy told InsideEdition.com. "Most musicians probably wouldn't do that."

His mom wasn't surprised to see that the kid on stage with Grohl was hers. 

"I could see Dave Grohl mouthing to someone 'Oh, you wanna play?' and I was like 'Oh, I bet that's my kid he's talking to.'''

"He's on that guitar all the time. Six in the morning, six at night," the mother said. "We practice a couple of hours a day. Sometimes with the amp plugged in, which is, you know, awesome at 6 a.m."

The Foo Fighters posted video of Collier's performance online, which went viral.

Collier wants to use all the attention to help his 8-year-old friend Bo, who suffers from several afflictions including diabetes, chronic lung disease and epilepsy. Collier's mom started a GoFundMe page to help Bo's family with medical care. In two days, the site has raised more than $4,000. 

"I'm trying to use all of this good stuff that's happening to me to help him," Collier wrote on Instagram.