The Invisible Garboil

The Invisble Gargoyle is a horrid monster which flattens Fraggles. Its first and only appearance in in Fraggle Rock episode "Gobo's Discovery." The Gargoyle, though itself invisible, appears as a foggy haze moving at rapid speeds through Fraggle Rock. It is freed by Gobo accidentally after he stumbles into the rock pile keeping it pent up. The Gargoyle is later tricked back into its lair by Gobo.