RPN

fractoid on /.: “Tweenbots” Test NYC Pedestrian-Robot Relations 

You’ll notice that it’s facing away from the stack of pigeons, because it’s a reverse polish cat. It’s preparing to perform a: 

rot # cat is now facing a pigeon 
dup 
dup2 # there are now 5 pigeons 
pounce # takes 5 pigeons and a cat on the stack, returns 4 pigeons 
# saved in temporary variables with high velocities and an incremented cat

hahaha