Corrected entry: When they hang out with Sam Jones from the Flash Gordon Movie, Sam says "Death to Ming", and that reference is later repeated again. But, in Flash Gordon, Flash never says those words. "Death to Ming" was uttered by the King of Ardentia just after Ming commanded him to fall onto his own sword.
Corrected entry: In the scene where Flash punches through the wall and the neighbor stabs through with a knife, watch closely as the camera makes a mistake and films the "set." Basically what happens is the camera moves too far to the right and films for a split second the room the Asian neighbor is in, while you can still see the room Flash is in, revealing the studio built apartment.