Personally, Kramer, I think you're missing a bet when someone like Nelson offers to show you an angel. Maybe you could respond by saying that while the existence of angels or deities is not a JREF testable claim, if the angel or deity in question is capable of performing a demonstrably paranormal feat then that angel or deity is welcome to apply for the challenge, and that, if he or she succeeds, then Mr. Nelson is eligible for Randi's $50,000 finders fee for introducing said angel or deity.
Just a thought.
Just a thought.