Have you ever noticed this on Oil Pulls? The big 30-60s are started from above by the operator pushing the flywheel clockwise with a leg. That always looked risky to me, but I guess it is OK. The smaller Oil Pulls are started from the ground by spinning the flywheel counter-clockwise, as in the following video. (Please don't grind the gears. Pull the clutch out, wait for the parts to stop spinning, and then engage the gears.)