I have had two old Minis like that and they are great for getting through the rush hour traffic. Great fun to drive. Pile of poo poo to work on though and no Mini I ever sat in (even NEW on test drive) had dry carpets after being out in the rain.
I would like to try the Chally on a course like that just for fun. Don't think the front brakes are good enough to stand the car on end like that though!