This episode was a montage of tributes to other anime shows. I think the more you have seen, the funnier it is, as you get the references. For me, it was HxH which was so on the nose, but I know there were others (not to mention Mission Impossible)! ππ. Not my favourite episode, but I enjoyed it more when I saw reactors who knew all the references laughing themselves silly.
And poor Anya - Yor taught her everything except when to let go of the ball! Next lesson - aim!