As Motley Crue's eye-popping Final Tour nears its conclusion on New Year's Eve, fans have to be wondering how they'll top themselves. After all, this tour has already been a whirlwind of explosions, acrobats, a flame-throwing bass and Tommy Lee's spinning roller-coaster drum kit, dubbed Cruecifly.

"There's a lot of stuff on paper for Dec. 31st, but I can't reveal too much," Motley Crue production manager Robert Long tells Rolling Stone. "Trust me, it'll be a great show – because the general principle with Motley Crue has always been, 'If it's impossible, that's when the work starts.'"

As they've continued through what will eventually be more than 150 of these concerts, a few adjustments have been made – including a limit on the number of times that Lee rotates. "He's never gotten sick on the Cruecifly, but we have had to decrease the number of flips," Long said. "In the beginning, there were just too many. You spend too much time upside down, with all that blood rushing to your head, and it becomes pretty hard to play."

Still, as this massive operation – Motley Crue are traveling with 12 trucks, nine buses and a crew of about 100, not counting local stage hands – comes to an end, it's hard not to believe they're going to up the ante once again.

Bassist Nikki Sixx wouldn't have it any other way. "You build a production so people will go, 'Holy f---!'" he said. "I don't ever want anybody to see something I'm involved in and go, 'Yeah, that was pretty cool.' I'm not interested in 'pretty cool.' There's no room for that. There's room for 'holy f---' and nothing else."

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