In a thread about whether or not to stop an engine for brief idle periods during the work day, a discussion about chocking the wheels of a tractor came up, then a member related the experience of having a vehicle without a hand brake and dealing with opening a gate on a sloped road.....The first thing that came to mind was The Gods Must Be Crazy and The Anti-Christ!

The gate-opening goodness starts around 1:20

YouTube - Series One in The Gods Must Be Crazy