My favourite is when the guitarist with the capo calls out the chords. Only they call out the chords that go with the chord-shape they are playing, not the *actual* chord - because they have no idea what the actual chord is.
For example - guitarist has capo on 3rd fret. Guitarist plays a G-shape chord, which is thus actually a Bb.
Guitarist: "G"
Me: (thinking: "ok, that's really Bb. Major.")
Guitarist: "C"
Me: (thinking: "Hmm, we're in Bb so that must be C minor ... oh, they actually mean Eb. Major. Ok.")
Guitarist: "E"
Me: (thinking: "ok so that's not really E, it's just E shape in third position, but wait that doesn't make sense because it should be E minor, oh wait it IS E minor because they don't even know the difference between major and minor!")
.... continues ad nauseum
quoted for truth, and this just confuses me more. Hate capos.