There is something to be said for gut feelings. Your story is fascinating and there appears to be a pattern to it. The ballarina, has she turned up dead yet? Eaten by some strange otherworldly creature. I'm fairly certain if she had been eaten at the ballet her screams and blood would have alerted your friend.
Judging by your friend's dream, I would agree with you. However, I don't think I quite understand. How are they memories? Memories of what? Or are you telling me carnivorous asexual rabbits are real?