^ There's your problem: You don't think. It doesn't hurt to ask, does it? "Hey, probation office, sir, could I start peeing alone then holler when I'm ready for you?" What's the worse they'll say? "No"?
Exactly. I always turned in such a way that they would see my dick in the cup. If they still give you a hard time, tell them that you will pull on it to prove it's your dick and not one of those wizzinator things.