Dilemma

So what do you do when you tell/ask your toddler not to shriek and scream in his crib at nap time (if it's just rest time that's fine with me too, and I would even just let him stay in his room, but he is not mature enough to accept that option and won't choose his big boy bed over his crib right now...the independence is too scary for him) and he starts obeying? He has been sitting quietly, exerting great self-control today after we talked about it yesterday saying, 'Mommy, I want to get out. Mommy, please, I want to get out please!' Well, stink, I still need him to stay in there, but now he is being so sweet and not tantruming. I should think these things through more carefully in advance ;)