Tow-behind mower. By Nate Woodruff. 2:01 video:
https://www.youtube.com/watch?v=FyqwYaFn8P0
Previously:
https://www.homemadetools.net/forum/...176#post149781
https://www.homemadetools.net/forum/...2740#post97020
https://www.homemadetools.net/forum/...2421#post76333
https://www.homemadetools.net/forum/...657#post143508