The Mystery Of The Disappearance Of Beavis And Butthead's Moms

Plot
We start off at the Higland Zoo, just minutes after Beavis and Butthead were born. Their moms decide to stop here to spend their first day with their newborn sons. Meanwhile, a delivery truck is pulling in to place their newest animal, a cloned Tyrannosaurus Rex, in it's enclosure. However, as they lift the gate to get the creature in, it rams the door, knocking the worker off balance, then rips the door out. The creature then proceeds to attack and kill several workers, then goes on a rampage through the zoo. Back with Mrs. Beavis and Mrs. Butthead, they hear on the announcement that the Tyrannosaur is on a rampage, and, having planned to stop at the enclosure, realize they'll have to cancel. However, the creature arrives and kills the two women, then smacks the stroller Beavis and Butthead are in, causing them to roll all the way to their moms' house. Back at the zoo, security has been called, and they shoot multiple tranquilizer darts at the creature until it passes out. Before dying, Beavis' mom begs a security guard to never let her son, or Butthead, know what happened that day, then dies in the guard's arms. Meanwhile, Beavis and Butthead have been on the couch since rolling toward the house, and spend the rest of their lives living in it.