Of course I tell my clients how to behave in court, what to wear, what to say, what not to say, how to react emotionally and when to start sobbing (if I think that they would be good actors). In some child custody cases where my clients couldn’t be present in person, I even tried to sway the judge by watering up myself. It worked. The courtroom is my stage.
After reading about the trial of Oscar Pistorius in South Africa, I might have to add vomiting in court to the repertoire.
But having a large, green bucket with you makes the whole act look less than spontaneous. If you want it to have any effect, you really need to throw up all over your desk.