See also his four part series (course, really) on wall, ceiling, and floor interactions: https://www.youtube.com/watch?v=UnU7DJXiMAQ https://www.youtube.com/wa

See also his four part series (course, really) on wall, ceiling, and floor interactions: https://www.youtube.com/watch?v=UnU7DJXiMAQ https://www.youtube.com/watch?v=UnU7DJXiMAQ https://www.youtube.com/watch?v=a9fUV7uA2_s https://www.youtube.com/watch?v=a9fUV7uA2_s https://www.youtube.com/watch?v=f1kbABTyeo8 https://www.youtube.com/watch?v=f1kbABTyeo8 https://www.youtube.com/watch?v=kRCjVLqjST4 https://www.youtube.com/watch?v=kRCjVLqjST4 It's amazing how engrossing they are.