Going to HR is indeed the end. I had one boss suggest that some incredibly minor conflict be solved by HR. Immediately, I knew it was time to change jobs. A few weeks later, when I handed in my resignation, my boss was surprised and tried to get me to stay. I offered them about a 15% increase in pay, but left as they weren't interested. I still don't understand why he'd be surprised. I suppose some people, even after many years in the corporate world, have no idea how it works. So I've come up with something to help me remember:

"Going to HR" === "End of job"