Danny Boy was sung by a man passing through town at an Irish session in Berkeley, CA hosted by Shay Black. This man had a sweet voice, and was getting dramatic with the song, fluttering his eyelashes and dipping the ends of phrases up and down. At the end of it, Shay stands up and say's "Thank you. Thank you. Not a dry seat in the house!" There certainly wasn't one after Shay's ad lib.