So funny! Answers saying it never happened to them - as though they've experienced ALL. This can happen so easily with the right circumstances - tar seams, railroad tracks, broken pavement, or just the right motion to begin the dance.
The DEATH WOBBLE in a Jeep is more devastating than in an F53 - but the effect on the driver' control is the same. Motion and energy within the suspension builds to a point where the wheels and the suspension are uncontrolledly flapping around, and the driver has no control. Slowing down a Jeep to around 10 MPH will stop it - on a F53, I don't know. Supension parts - shocks, steering stabilizer, and other "wear items" reach that special point where the problem happens. Fortunately, parts seldom fail totally.
To cure (in order of cost) - tire pressures, steering stabilizer (heavy duty, please) - alignment - heavy shock absorbers - TracBar. A F53 doesn't need extra help to achieve good handling... seriously? One other suggestion - rear end additions - bigger sway bar and/or rear TracBar.