Spencer and Carly are hugging, then Sam asks "How do you turn this lamp on?" The camera points at Spencer and he shouts "lamp" (but in Japanese because it's a Japanese lamp that is voice activated) then the camera points at Sam as the lamp turns on but you see the hand on the left hand side of the screen that pulled the string to turn on the lamp and the man/women who turned it on does not bother moving their hand so it is left in shot. That goof shows that the lamp is not voice activated.