[FBD]

“...bones of rhinos and cave bears
Going up against them with spears.
Those were real hunters.”

-isn’t it entirely probable that the rhino and bear bones were scavenged from already dead rhinos and bears? Not only probable, but I’m guessing more likely, especially then killing a rhino.

[minnesota_bound]

Neanderthals used .45-70 spears for rhinos.
Example below.