Most have not been able to understand it. Yes, you get in the drivers seat, put on your seat belt, hold on, and step on the gas without letting up. Some owners install Pitch and Roll gauges to measure the steep angles they traverse. Err, ahh, No, Quite the opposite. However, Hummer owners are already dreaming up plans for an inflatable, aluminum framed Pontoon Barge.
Many owners talk about brake pedal height or elbow height of water in the passenger compartment.
There are drain holes in the floor to let the water out afterwards if you forget to put the plugs in. Eventually one ends up with all kinds of winching paraphinalia. Hummer owners put their vehicles to the test in swamps, marshland, mud pits, rocks, ditches, mountains and the like. The owners like it even better when it get's stuck in the mud and have to use the winch to pull it out. They also get at least waist deep in it, themselves.