I know a poet who, when he forgets what line comes next, stops...looks at the audience.....says out loud "turn around once".....does so....and the line comes back to him. He reckons it is the turning around that settles the line back into his brain. People smile, chuckle, settle back and enjoy the rest of his performance. It's not uncommon to see them turning around as they get up from their seats, saying lines of poetry as they do so!
Cheers
JennieG