What do you say to someone who has been a hero of yours for years and you finally get to meet him?

This Saturday I get to meet James Randi (for those of you who know me and know who he is, you’ll know why it’s a big deal to me). It’s an informal meet and greet. I normally am not at a loss for words, but I’m afraid I’m going to be reduced to blathering nonsense like, “You’ve been a hero of mine for years…”