Leo didn't panic. He just reached for his mouse and opened lesson_05_reconstruction.py . He had a feeling the next lesson was going to be the most important one of his life. Are you referring to a specific meme or person on GitHub?
While I can't guarantee current "hot" status, these are : geometrylessonsgithub hot
Every "hot" geometry repo has a section on avoiding "Gimbal Lock." Quaternions use imaginary numbers to rotate 3D objects smoothly. The GitHub repos provide visual sliders so you can see the math happen in real-time, which no static textbook can offer. Leo didn't panic