I had pulled up to a drilling rig, not a cloud in the sky. i went in trailer to see company man. i had to step back out to my truck and i and several roughnecks, a hotshot driver and the 2 company men came out side to show them this cloud that came out of nowhere. it was rotating, rolling going across the location. i stood on the porch and took 3 pictures, not moving. the cloud got closer to the rig and it began to lightning but no thunder. the next day several of us at different locations all got the same picture of these 3 blue/green triangle lights! i was trying to retrieve pictures from my camera roll on snapchat and they were not there until much later that evening. we were amazed at the clouds. had no idea there was more to see!!Ðÿ˜³