My ball also does this with a laser temp gun, I was surprised that he saw it I figured red would be off the visual spectrum, then my brain kicked in snakes 'see; heat right, IR radiation, so red is on that end of the scale. I am guessing if anybody knows I love to hear!! I actually don't like startling him with it so I start in the far corner so he can see what it is and not have a small fit with the magically appearing spot next to him. He often reacts the exact same as the vid but sometimes much stronger he has been quite startled and has hidden his head and also quite fast in his tracking of it. The only time he fails to notice is when he is tightly curled in a hide!!
A