When animated bg is mentioned, for me, Cowpoke always comes to mind,
but here's a couple that might not be named. Maybe not the best, but those
balls on All-the-Way are not only popping, their the entire object of the games
scoring. Oh yes, and that arrow being the 2nd animation on this machine is
also a big factor in the games play..
Maybe a little off topic, but Time Trials is probably the best playfield animation
in the collection..