well I'm in choir yesterday.. we're playing along one of the 'standards' we do weekly.. and I'm reading the chords as I normally would.. I get to page 2, and we're playing along. then what jumps out at me.. a Dm ..  well Dm it 's not hard.. but my brain goes.. "WAIT!!!!.. What have you done for the past number of years with this song.. How long have you been playing this song wrong???"  of course we're scooting along at 4/4 march tempo of 95+ bpm.. and I'm now scrambling to keep u