One of the giants has made a wax model of Fitzhugh. It gets bumped and falls to the floor, where it shatters. However, before the fall, we actually see Fitzhugh in costume on a table (pretending to be a wax figure). When he starts to fall, his eyes blink (which of course, a wax figure wouldn't do).
The episode takes place at night, but the shot of the house Betty goes to to call the police is in daylight.