Poppy fields and men harvesting opium

The video consists of an introduction, a pause for reflection, and a mention of an unexplained reason.

How does the tone of the speaker change from 'Well.' to 'Wait wait wait.'?

What do you think the speaker is trying to convey with the phrase 'Wait wait wait'?

What could be the reason mentioned in the text?

What emotions might the speaker be experiencing when they say 'For some reason.'?

In what context do you think the phrase 'For some reason.' is used?