Bam Margera Mourns Ryan Dunn's Death (VIDEO)

In his first interview since his "Jackass" co-star's death, Bam Margera called Ryan Dunn his "best friend" and "the happiest person ever."

"I've never lost anybody that I care about," Margera said through tears on Monday. "He had so much talent," he later said, "and he had so many things going for him."

Dunn died early Monday morning when the Porsche he was driving jumped a guardrail and burst into flames after hitting a tree. Zachary Hartwell, 30, also died in the crash.

Margera was in Arizona when Dunn crashed, and he said he inexplicably tore apart a van at the time.

"At 12:30, I just started punching out the windows of the rental van and ripping out the speakers, and I don't even know why. I wasn't mad at anything or anybody, and if it's 12:30 there, that means that it was exactly when he crashed."

A toxicology report released today revealed that Dunn's blood alcohol level was more than double the legal limit when he crashed.