Step 3: Preparation
Make screenshots of the frames and arrange them on a canvas in a photo studio. You can add numbers to the pictures to keep the right order.
Print the frames in the right size and transfer the animation per hand on a sheet of paper: Each frame in another color (see photo). Surely it is kind of an advantage when you know how physics work and bodies react on impacts, actio & reactio etc etc, but a picture drawn in 20 seconds in the dark with a laser pointer doesn't provide much place for details anyway.
- Draw a curve where your character moves on (if it moves)
- Start with a frame in the middle, add first and last frames
- Make crosses on the curve for the missing frames
- Add the frames in between.