Bar and Danny are former members of Mr. Bungle who now live in Melbourne. Mr Bungle are touring Australia in March.

This resolves YES if either Bär or Danny joins the band on stage at the Melbourne show. They don't necessarily have to play a song together.

If they join the band for another show but not Melbourne, still resolves NO.

If the show is cancelled this will resolve NA, unless the band/Bar/Danny confirms that something like this was or was not planned.