I remember reading a comic in which the Silver Surfer temporarily granted Power Cosmic to humans. Here are the details I can recall:
Silver Surfer was possibly dying.
Power Cosmic looked like it was raining down to humans. In that scene, the Silver Surfer was on a skyscraper looking down.
I am not sure whether entire mankind was affected or just a city.
Power Cosmic expanded the minds of humans who could now see beyond traps of negative emotions or something.
It was a very emotional story. The dying Silver Surfer allowed humans to experience Power Cosmic.