If this happened, if as described, and if nothing relevant was omitted, the DU-guy handled it well. That's a lot of "Ifs", and it's a DU-member telling the tale. And, frankly, unless the DU-member works for the union or is a shop steward or for some reason was directly asked, I don't know why his being a union member would even be mentioned. When people ask me what I do for a living, I NEVER make a point of mentioning my jobs are non-union.