When the ship model built from matches ends up stuck between the elevator doors, the force from the door actually makes one match go off and light up. If you look carefully you can see the burning match stick jump away to the left, in flames. They were lucky the whole model did not go up in a blaze.
Julie states her age as 25 but she had her 10 year high school reunion during episodes 18/19 which should make her 27 to 29.