Or having to ask a band member every other line, al la Vegas Elvis.
Dude I got an anecdote for ya.
I had hired a new keyboard player for my jam band. Good soloist, no good with form.
But he was tight with the drummer who really wanted him on the gig.
Two tunes the form was just killing him one was an AABA vamp, the other a 16 bar Blues 12 bar + 4 more bars on the I chord).
So when he gets on the AABA to the A part he starts over, meaning the second cycle he goes into B 4 bars early.
Same with that extra 4 bars in the Blues. Ends up going to the IV chord 4 bars early.
Never writes it down either. In rehearsal he texted the bassist asking what the changes were.
That was already annoying.
So at the bandstand, and I like to stop my band mid song the drummer literally prepared flash cards.
He still messes it up with the drummer holding up a sign I for 4 bars, then IV for 3 bars etc
Still messes it up.
I stop the band explaining to the audience that the clown didn’t do his homework so we teach him
He starts comping…
The band and audience scream
One one one one four four etc
He got it, we start again. Messes it up again.
I tell him to sit on his hands.