Been watching Top Gear reruns - both UK and US versions. This episode featured a custom made tractor supposedly designed and built by Matt LeBlanc who was annoyed by the numerous slow tractors clogging Britain's B roads. The only clips I could quickly find were this - just the introduction - and the Stig breaking the Guiness record for top speed by a tractor.
At one point they perform some mundane agricultural tasks like trimming a hedge and plowing a field.....at about 40 mph.
Funny as hell!