Same happened to my cousin. Her screen broke from the fold. Samsung says no warranty, since "it's caused by a 2mm scratch in the hinge". That scratch was caused by a bump into metal while she was carrying it by hand, it wasn't hard.
In fact, the phone I'm writing from has had much stronger hits, all to the corners and my aluminum is more marked than hers, but my screen is intact. (Mine is an LG G7, for the record).