I've rebuilt wrecked airframes, gearboxes, machine guns, Supersport motorbikes, and a few tinker toys as well. Still never understood how to set up a differential.
Kierkegaard is an existentialist. He had many thoughts on the process, banality, and things we face in our lives.
As to jokes, they self write for people who think punching a paper/steel target is anything beyond a sporting hobby.