Blaise was a bit laconic (read: he waited to see that one or two other students didn't get some weird jack-in-the-box moment/hex). He looked impassive, didn't bother making a wish, and sewed the bear back up. He looked a little put off by Lulu's backflip, and eyed it warily for a second, lest it start cooing like some of the other ones. Since he only got told to do Expelliarmus, that was what he did unless told otherwise.