Many moons ago at LGW and a brake test on a 1-11 engineer at controls, pilot sitting in cabin.
Trouble was they were taxiing into a headwind and guess what happened?
It was an uphill struggle I can tell you for that pilot (couldn't have happened to a better bloke!) to get into the cockpit and do a very very quick circuit and land the thing.
It was rumoured that it ran out of fuel on the landing run but I can't confirm that.