Continuity: In the scene when Laurie sees Amy painting in Europe, watch his hand carefully. During the shot that's the closeup on him, you see him take his cigarette out of his mouth and throws it on the ground. But in the next shot, when you see Amy in the foreground and Laurie walking towards her in the background, notice how he, once again, removes the cigarette from his mouth and throws it on the ground. Unless he picked the cigarette up from the ground after the first time he threw it...
