I agreed to a "green light, fail to proceed as directed" rather than a 3 point disobey sign. I know I should always fight, and I was reasonably well prepared, but I haven't had a convinction in 12 years and a no-points $50 fine wasn't so bad. Anyway, the prosecuter told the court I was willing to plead to the lesser charge, then the clerk read the charge and asked for my plea.
I said "Your worship, to save the court time, I am considering my options. Before I make that decision, I need to know that the crown is ready to proceed, and I have not seen the crown's witness in the courtroom." Man, did that piss her off. "Of course the officer is here, sir! Do you think I would try to trick you?" "I don't know." Then the JP asked her to confirm that the officer was there before making the clerk read the amended charge again.
That would have really sucked, to plead guilty if the crown had no case!