He was just a kid. They were all just kids. And when James Todd Smith's home-recorded demo tape arrived at Rick Rubin's NYU dorm room on University Place, Rubin didn't even listen to it at first. But the guy who was crashing with him did — Adam Horovitz, who would go on to become famous as Ad-Rock in the Beastie Boys.

The participants pick up the story from here, in the forthcoming Def Jam Recordings: The First 25 Years of the Last Great Record Label, which is excerpted this month by GQ.

LL, no surprise, is an engaging story teller. Here he describes the arrival of hip-hop in the daydreams of a school kid in the late 1970s:

I was about twelve when I started writing my own rhymes. One day in junior high, there was this lone kid, wearing a knapsack, walking about twenty or thirty feet in front of me. It was just the two of us in the hallway. He was kind of diddy boppin' and singing his version of the children's song "This Old Man"—"This DJ, he gets down, mixing records while they go round." I couldn't see his face, but I could hear the echo in the hallway. It was as if he was in another dimension, in slow motion, like a dream. But the way he did it, I was, like, "I wanna do that right now!" After that, I was writing, writing, writing. At fourteen, I started sending out demo tapes.

Smith fired off a tape to 5 University Place, the address on the label of Def Jam's initial hit, "It's Yours," by T La Rock. When the group of college kids finally met the phenom from Queens, each had a surprise for the other:

Adam Horovitz: He was a kid. He had the classic early eighties b-boy look: tight Lee jeans, adidas shell toes, fat laces going up the leg, a Kangol, Cazals, a Le Tigre shirt. And LL was just like, "Who are these people? What's up with these white boys?" Not only that, but Rick was in this weird dorm room. I'm assuming LL expected it to be an office with a secretary and coffee—like on TV. He was just shocked. It was really funny.

LL Cool J: When Rick came downstairs, the first thing I said was, "Yo, you Rick?" He said, "Yeah." I said, "I thought you was black." He said, "Cool."

Rick Rubin: Everyone I met in hip-hop was surprised that I was white. It really was an oddity in the places I was going. But I felt like our passion for music overrode any color, or of my being, you know, the suburbankid. It seemed like we had something in common that was much more profound and special than our differences, something that not so many people had: the love of this music. And together we were the minority. That's how I felt.

It's a great story of a remarkable moment in New York City, one that spawned a global culture. Go read it here.

Oh, and here's something you didn't know. Mr. Smith's friends all call him ... Todd.