The Felix Helix

That's what it sounds like when we take Felix on the subway.  He stands on the platform, greeting every train that comes in with freakishly excited "choo choo!" exclamations, and then waving them all out, going, "bye-bye choo choo!  bye-bye choo choo!"  Slightly repetitive, but really cute.  Unfortunately, he gets so excited on the train that it's fairly impossible to get a good picture.