When I was a kid, there was a Tex Avery cartoon where Droopy Dog was chasing down a crook who escaped from jail. There was a particular scene where the crook (I think it was a wolf in a black-and-white striped jumpsuit) takes a bus, a plane, a ship, and a taxi to a secluded cabin, and then closes a series of increasingly complex doors with a large number of locks, in order to hide away from the pursuing cartoon basset hound.
Of course, when he turns around, exhausted by all the effort he puts in, he realizes that Droopy is standing right behind him, and greets him with a monotone “hello.”
I haven’t seen this cartoon since I was 7 years old, but I almost always think about it when I am using multi-factor authentication.