UK Labour Leader Jeremy Corbyn gives first 2017 Election speech

The speaker introduces a session where questions will be taken from both the media and the audience, breaking from tradition. Questions will be grouped in threes to maximize participation. A personal anecdote from 2015 is shared, highlighting an unexpected success. The session concludes with a remark on the rarity of politicians who answer questions directly.

What does the speaker hope to achieve by taking questions from the audience?

What does the speaker mean by 'mic drop'?