Nor optical or laser, simply this little creature that is also a mammal! The mouse does considerable engineering when making tunnels with entrance, ventilation and giving access to desirable points. As the mouse knows where the good food is, some see a reason in this for establishing aggressive or even fatal policies when the creature takes some. Much worse is how the mouse is captured, incarcerated, and used for experiments.
From here some words of friendship to this mammal and the hard life that must experience being so little, in a world where the big could act savagely, without respect and abusing its position and perhaps also to despoil different private benefits. Not everyone places and signs that behavior in its history though.