This is ‘Lost In Motions,’ a fun stop motion video created by Argentinian filmmaker Fernando Livschitz using 800 individually laser-cut dancer silhouettes. Perhaps just as cool as the finished product though is the behind-the-scenes footage that plays after the short, showing how the entire thing came together. Still, going with

This is a short video from Pennsauken Township, New Jersey of a cat chasing a laser pointer until the beam lands on a bigger cat, at which point it stops chasing, presumably because it’s gotten its ass kicked before and remembers what those claws feel like. Some more info directly