If your were a witness at a trial?

Question

and they asked you "do you swear to tell the truth, the whole truth, and nothing but the truth?" What would happen if you said "no"?

Answer 1

Contempt of Court charge.

Fines.

Jail.

Have a nice time.

Answer 2

didn't like the answers last time?

Answer 3

Not a good idea, better to just refuse to be a witnes but if it happened I would doubt that any of your testimony could be used.

Answer 4

You'd end up in the clink.  

Answer 5

The Judge would advise you of the penalty for committing perjury and then ask you if you understood the consciences. And after stating yes the trial would resume with you being under pressure to tell just the truth or else you would find yourself in jail.

Answer 6

They'd probably treat you as a hostile witness, charge you with contempt, and seek to charge you with obstruction or perjury.

Just say yes, and plead the 5th.