Accelerating to about 5k rpms and then the rev count oddly fluctuated and then dropped to 0 and my battery and check oil light came on and power steering went. No response from throttle.

Had to quickly turn into a side street (couldn't believe how much of a different not having power steering makes)
and restarted. Let it run for a little.
Everything was fine after that.

What could have caused it to suddenly die like that? I've had it run rough before after that kind of scenario and usually letting it go into neutral for a second or two fixes it up and I can continue.

It's never gone out like this before though.