On Nov. 11, 2006, Axl and GNR took the stage at The Michael J. Fox Foundation for Parkinson's Research. "Michael had asked [me to perform]," Axl told People. "We actually used a sample of Michael J. Fox from [his film] 'Casualties of War' in one of our songs that will be on the new album. So I felt, one, I've always been a fan of his. And I also feel for the guy and his situation. I'm for stem-cell research, so I just thought it would be wrong not for me to come when I was asked."