“To Be Invited or Not to Be” sees the quadruplets making a new friend who is also an inventor. Her most recent invention, an invisibility suit, apparently has a certain effect on people when they see it. Towards the beginning of this episode after her suit is revealed, each of the quads faint one-by-one out of shock and fear (among other things). Then at the very end of the episode the quads and their new friend pull a prank with the invisibility suits and are seen by their other friend (Simmons) as just floating heads thanks to the suit. Naturally she follows the trend and faints away too.