Aleksandr Petrov animation (oil paints on sheets of glass)
https://www.youtube.com/watch?v=JHFlnwXKhsM
12 Principles of Animation
(0:10) 1. Squash and Stretch
(2:07) 2. Anticipation
(4:14) 3. Staging
(6:33) 4. Straight Ahead/Pose to Pose
(9:14) 5. Follow Through & Overlapping Action
(11:17) 6. Slow In & Slow Out
(12:57) 7. Arcs
(14:38) 8. Secondary Action
(16:11) 9. Timing
(18:22) 10. Exaggeration
(19:55) 11. Solid Drawing
(21:38) 12. Appeal
https://www.youtube.com/watch?v=uDqjIdI4bF4