Mrs Twit may have been ugly and she may have been beastly, but she was not stupid.
High up there in the sky, she had a bright idea. 'If I can get rid of some of these balloons,' she said to herself, 'I will stop going up and start to come down.'
She began biting through the strings that held the balloons to her wrists and arms and neck and hair. Each time she bit through a string and let the balloon float away, the upward pull got less and her rate of climb slowed down.
When she had bitten through twenty strings, she stopped going up altogether. She stayed still in the air.
She bit through one more string.
Very, very slowly, she began to float downwards.
It was a calm day. There was no wind at all. And because of this, Mrs Twit had gone absolutely straight up. She now began to come absolutely straight down.
As she floated gently down, Mrs Twit's petticoat billowed out like a parachute, showing her long knickers. It was a grand sight on a glorious day, and thousands of birds came flying in from miles around to stare at this extraordinary old woman in the sky.