http://www.jwz.org/blog/2014/12/youll-find-my-escalator-requires-extra-attention-today/
*...or maybe you just like watching colored balls bounce. Seemingly FOREVER.
PS: jwz has a VERY addictive blog. #YouHaveBeenWarned.
(which, ironically, I [re-]discovered via http://fishbowl.pastiche.org/2015/07/08/the_death_of_blogging/ -- funny considering what I just called jwz.org ain't it)
Bwuh!