It is one of the fun things about graphics programming. Bugs can also sometimes be funny enough to dispel the frustration. But when you've been futzing around

It is one of the fun things about graphics programming. Bugs can also sometimes be funny enough to dispel the frustration. But when you've been futzing around with quaternions all day, and your camera finally stops acting like a hyperactive husky who hasn't had a walk in days...well, I imagine that's close to what it felt like when they got the internal combustion engine to stop being an external combustion engine.