Met him backstage!

I can second Danny Devito being super nice. Met him once backstage at a concert, and another time at comic con. At the concert, he was the one who approached me and the crew I was working with after he seen us whispering about him. Said whats up to everyone, shook our hands, and asked us to take a pic with him on his camera. Dude from Queens of the Stone Age was the one taking the picture haha.