You mean
the intentional abrupt blackout done by the creators of the show for one of two reasons:
(1) Incredibly meaningful artistic symbolism
or
(2) They had no idea how to end it and decided to pretend like they had planned to do (1) all along.
A few people have said words to the effect of "I don't say XXXX except for in jest". I wonder if that's really true, or if people hide behind the '
I'm joking!' defence when they say something they know is distasteful.