May 2nd, 2014
Burn marks in paper from a laser within the Gemini laser. By putting a sheet of paper in the path of one of the lasers that amplify and make up the Gemini laser you get a burnt mark and a very loud bang. The laser fires every 30 seconds for a very brief period of time. You can see the variation of power in the laser, probably caused by alignment issues (it was mid way through an alignment process at this point)