On October 31, 2015, a weird phenomenon was captured by Larry Perkins in the sunset sky of Penrose, Colorado.
The Sun, just below the horizon was casting a shadow of a plane contrail up to the bottom side of some clouds. Like a twist.
As he explains:
I went outside just as the Sun had dipped below the horizon. Looking west I noticed something I had never seen before. Its common to see a contrail cast a shadow down to clouds below, but this was different.
A jet had flown and left a contrail below a layer of clouds higher up. The Sun at such a low elevation angle was actually casting a shadow of the contrail up to the bottom side of the clouds.