creative uses of monster pathing

something that you don't see often (though i wish was) is creatively using doom's monster pathing in creative ways. a great example of this to give everyone an idea of what i mean by that would be Barbie Girl by capellan, someone who i will not be tagging this time because i have a feeling if i do one more time he's going to strangle me. it's this really neat map where you have to use a pinkie almost like a companion cube, guiding it around as part of various puzzles that you have to solve in order to progress through the map.

knowing doom, this is likely very, very far from the only example. so what're some other cool ways that monster pathing has been used?