Pay close attention to the scene in the airplane where Butthead is behind one of the flight attendants in the aisle as she is serving dinner. He says, "Hey, I got a beer, want some?" A split second later, we see Beavis rush the cockpit and scare the pilots. At this exact moment, we now see Butthead at the back of the plane with that same flight attendant (same hair, clothes, everything), only she is seated in one of the take off seats and reading a book. Even if for argument's sake, Butthead did walk to the back of the plane, that same flight attendant couldn't have been there.
[While the shots and scenes happen one after another there is no time reference to know how long after Butthead was talking to the flight attendant before Beavis went into the cockpit. Its impossible to tell whether Beavis went right after or it took him a few minutes.]
Corrected by Lummie
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