If the dwarves put Snow White in a glass coffin wouldn't she have suffocated?
if you can believe in snow white, magic, witches, dwarves, poison apples, and princely-kisses resurrecting a comatose virgin......
then not suffocating in a poorly constructed glass box is probably not much of a stretch.
p.s. i am not sure if science at all enters into this thread high jack, but i can live with it given the lock out.