The existential crisis of every 3D graphics programmer or robotics engineer! Gimbal lock is that special mathematical hell where you lose a degree of freedom in your rotation system because two axes align. It's like trying to parallel park when your steering wheel suddenly decides it only wants to turn left. You can read about it 500 times, draw diagrams until your fingers bleed, and still find yourself at 2AM, surrounded by crumpled papers, questioning your career choices. The solution? Quaternions! Which is basically saying "let's solve this problem by adding a fourth dimension that nobody can visualize." Engineers have been pretending to understand this since 1843.