I love rides like that. I always suffer and ride hard on my rides, but sometimes I'm just in the zone --- and it's totally different.
There was a solo loop I did from downtown Denver up to Evergreen and back (85 miles). I was hit by a massive thunderstorm that was rolling off the mountains. I got into that zone and was just tearing it up for the whole ride. On the way back, I was descending 285 at 40mph in a downpour. It was just awesome.