Toy Story Buzz freezes

So Buzz Lightyear doesn t believe he s a toy does he? In fact, this is the basis of Toy Story s excellent script. Buzz has issues and thinks the other toys are insane in their beliefs. Yet he still freezes when a human comes into the room doesn t he? Is it peer pressure? Fright at a giant monster? An innate understanding of his true nature? Hmm, perhaps I m starting to over think these plot holes