Post offices close because of anthrax fears

The video tutorial briefly introduces a topic with the phrase 'I wanna go.'

What does the phrase 'I wanna go' imply about the speaker's feelings?

In what contexts might someone say 'I wanna go'?

How might the tone of voice affect the meaning of 'I wanna go'?

What are some possible reasons someone might express a desire to leave?

How can body language complement the statement 'I wanna go'?