"That's what I told ya" is a gag used by the Creatures but mainly Kootra, it means something like hindsighting (example: "You're going to die." "I died." "That's what I told ya!"). The quote originates from a video that was first used on Creature Talk Episode 27 around the 1 hour mark. It is a reference from the video Phoenix Dust Storm 7/5/2011 from south mountain.