I actually still have and use my Daddy's tiller (circa early 70s) it is a beast if the tines are sharpened it "will dig you straight to China". It takes muscles to pull back on it so that it will go forward instead of down. When they are dull it works easier.
Just had a funny thought... with my leg doing the hokey pokey wonder what I would look like out in the garden behind that beast now ROFLMAO