SLAYER guitarist Kerry King will join MEGADETH on stage tonight (Thursday, October 21) at the Gibson Amphitheater in Universal City, California to perform MEGADETH's classic "Rattlehead". This will mark the first time in 26 years that Kerry has played the song with MEGADETH (King took part in MEGADETH's very first shows in February 1984 as the band's second guitarist; see video below).Tonight's Los Angeles-area concert is the last show of the Jägermeister Music Tour, featuring the original "Clash Of The Titans" lineup from 1991 — SLAYER, MEGADETH and ANTHRAX. In a 2006 interview with Decibel magazine, Kerry King and fellow SLAYER guitarist Jeff Hanneman spoke about King's decision to play MEGADETH's first live shows more than 20 years ago: Jeff Hanneman: "I thought [Kerry] was an ass for doing that. [laughs] I remember talking to Tom [Araya] about it, like, 'I guess we're gonna get a new guitar player.' I thought he was kissing Dave's [Mustaine] ass or something, and I thought it was kinda fucked up. I think he was gonna join. Kerry will probably tell you something different, but why do that if you're not thinking about joining? I'm a loyalist, you know, and I thought SLAYER was the best thing going. Why go hang out with somebody else? If Dave would've asked me to do it, I would've told him to fuck off." Kerry King: "I did it because I admired Mustaine — I'd seen him play with METALLICA. He'd be up there drunk off his ass, just ripping, not even looking at his fingers. Me and Jeff didn't know how to do that yet. [laughs] When he got kicked out and was sniffing around for a guitarist, I figured I'd do it because I thought I would learn something. The other guys in SLAYER were probably unhappy, but we weren't really known back then, and the way I looked at it was that if people saw me playing in Dave's band, it'd be more publicity for SLAYER. Now you look back and you think 'supergroup,' but back then, absolutely not. I played their first five shows, and then I was like, 'Man, this is taking too much of my time.' I can't speak for Dave, but I don't think he would've been unhappy if I stuck around."