Just to understand: Did it roll upside down, with people’s head at the bottom, or sideways, with people’s back to the front of the direction?
I think parent was saying the roll was along the planes' length rather than tail-over-nose, the latter usually result in the aircraft breaking up as the torque will be really high.
- longitudinal axis: roll, controlled by ailerons.
- vertical axis: yaw, controlled by rudder.
- lateral axis (through the wings): pitch, controlled by elevators.