Watch: An Incredibly Rare Rainbow Waterfall Lit Up Yosemite Falls for 8 Minutes

It took two unusual circumstances for this to happen, according to Harlow’s video caption. One is that there were high winds in the area at just the right time of day, and the other was unusually heavy water flow for November.

According to SF Gate, Harlow was there to shoot the fall at sunrise when he saw it turn red and then the full spectrum of the rainbow. Only about 10 other people saw it happen. No doubt Harlow has seen plenty of incredible things in nature in his line of work, but he called this one “the most jaw dropping moment of my career so far.”

If you’re looking for a Yosemite waterfall phenomenon that’s a little more regular, there’s always the February “firefall” that lights up Horsetail Fall for about two weeks.