cav551:
Depends on which leaf breaks and whether ahead of or behind the axle. A main leaf breaking ahead of the axle could result in a loss of steering control. If a leaf digs into the road surface it could turn the vehicle over.
Yep, Main leaf can cause a bit of trouble, but the others, not so much. I had a centre bolt go on the rear of a prime mover. I didn’t realise until I noticed it crabbing. No air bags in those days.