Abigail, who received a lot of praise on Twitter for the question, asked:
Why should the public trust anything you say, when you have a known track record of broken promises, and backtracking during your time as Home Secretary and now Prime Minister?
Later on, the Tory leader made a dig at Diane Abbott's miscalculations - when an audience member called her out saying:
I'd just like to pull you up on the comment about Diane Abbott's miscalculations, that you made a few minutes ago. Because, Phillip Hammond, who's the Chancellor of the Exchequer, got a 20 billion miscalculation a few weeks ago - so I think that's a bit rude of you.
The audience member in question, was - shock horror - a young person!
Another young person in the audience called out the Prime Minister on not knowing her figures, saying "you're the Prime Minister of the country, but you don't know how much aid we're sending to North Korea?"
Another asked the PM if she thought we had any real leverage with Brussels?
And another, showed a passionate and memorable response about Tory cuts to the NHS and under funding on mental heath services.
Last night, @Theresa_May had no answers when asked about her record on mental health. She has failed those in need… https://t.co/d0UkXWZH2o
He was asked by young people about how he would react to nuclear weapons and "How can I take you seriously when you have not expelled Ken Livingstone for antisemitism?" as well as "Why have you never recognised the IRA as terrorism?"
The older people in the audience however, were more obsessed with grilling Corbyn on whether or not he'd press "the red button" and well, not so-tough questions like: "Is Labour’s manifesto just a letter to Santa Claus?"
Would Corbyn press the red button?