Hellraiser Dave Navarro managed to "freak out" shock rocker Marilyn Manson - by spraying blood over his bathroom mirror.
The Jane's Addiction star is close pals with Manson and contributed a guitar solo to a track on his 1998 album Mechanical Animals.
And he's revealed the scary-looking singer has a surprising secret - he's actually squeamish and can't stand the sight of blood.
Navarro tells Q magazine, "I don't know if this is funny, but when I was using intravenous drugs, I used to go in his bathroom and spray his mirror with blood from my syringe. It freaked him out. He would get his assistant to put on rubber gloves and clean it up.
"Right after, I'd go and do it again just to push him. I thought it was funny to be able to freak out Marilyn Manson."