The guide laser can be clearly seen under the big tube. It looks more like a plain old AixiZ
module than HeNe. Though I must admit that I am intrigued by the idea of a HeNe that fits
inside an AixiZ module, or would be if such a thing existed.
Before I was familiar with absorption properties, I tried "burning" ice with an 8X pointer. Few years ago.
Though I would be interested in seeing CO2's effect with ice. CO2 lasers are used specifically in dermatology as it reacts so violently to the water in your skin. Could only imagine what interesting effects would come from pointing it at a large chunk of ice.