The images and animation below are 3D renderings of the runtime environment of ML programs (Objective Caml v1.05). Linked lists are easily recognizable; if you think you can see balanced binary trees and hashtables then you should probably logout and take a break.
For some reason, the mpegs don't work well with xanim. Use mpeg_play or xmpeg instead.
let rec gen tmp = function | 0 -> tmp | n -> gen (Random.int 10000::tmp) (n-1) let l = Sort.list (>) (gen  20)GIF (8 Kb) ,