How about mowing your grass at 15 MPH? :o
A six foot wide swath!
9 acres an hour!
Gasoline, propane or diesel power!
Up to 35 HP!
(https://i133.photobucket.com/albums/q75/djmillerbucket/oddsnends/extreme-mower-diesel.jpg)
http://www.dixiechopper.com/models_APD.php
I wonder who buys these things? :-/
(should almost have put this in the Hot Rod Corner)