Corrected entry: When everyone is playing "Charades," the Invisible Man shakes his head. The earpieces on his glasses open and close while his head is shaking. This would mean not only is he invisible, he would have no substance.
Phixius
24th Mar 2014
Correction: It's just a trick of perspective, they don't really open and close. As he turns his head, the angle from which we see the glasses makes it appear as though one arm has been folded in because we don't have any point of reference (such as a face) to show us that the frames have merely rotated.
Phixius ★