IHate Sam's Boyfriend - S1-E15
Corrected entry: When Spencer is making his claymation movie, he says if his set is messed up, he has to start the whole movie over again. However, Spencer still has all the frames he previously shot, so he just has to shoot that last frame again. But Spencer still shoots the whole thing over again. Also, when he is shooting it again, he doesn't move the figures at all.
Correction: He does have the other pictures, but the models are out of place, and it will look like it has jumped. He has to start again, so that it isn't jumped. Also, he moves it slightly, so when the pictures are all put together, it flows.