Forgive me if I've botched any math, but here's the situation I've found myself in (assuming 4th level):
Falling damage caps out at 20d6 at terminal velocity. Kronan the Barbarian has 55 Max HP currently. (+3 CON mod, three great HP rolls at level-up.) That means that from Max HP, a fall of any height has approximately a 0.00% chance of instant lethality. And he has Relentless Endurance, so he has a 100% chance of getting up and walking after the fall if he hasn't expended it. He's also got the Bear Totem Path, which cuts non-psychic damage in half when he is raging. That means that even if he has spent his Resilience, his chance of death is about 0% as long as he was conscious and raging before he hit the ground. And he can apparently do this repeatedly as long as he manages to keep at least 1 Hit Point.
Is this correct? Is this character really capable of circumventing death by falling? Can this character willfully jump from the top of a skyscraper multiple times in succession and live to tell about it? Or have I made some mistake?