It’s the same principle applied to explain it . Flip or the multiple flip ( roll over and over and over ) on incline or flat . In flat there is outward force ( off set by the incline and not shown in ale’s diagram ) so the only thing what prevent the car from flip is its weight and velocity ( momentum ) ... when you are doing sidy in a pretty inclined curve you should keep the velocity constant in a steady given direction . If you slow down , then direction has to change toward and not against FII ( in the diagram ) so the trajectories are parallel or more let say convergent on one line and not divergent ) otherwise the mass of your car will come in to parallel with FII and here is exactly where you flip over because no matter how powerful is your engine to offset ( fight ) this is of no use
see below this ( I have posted before also in the thread of what went wrong )
@Ale Vallecchi excellent post I have always loved applied physics , but not at times of university sure 😆