Although this article deals with the Big Lebowski and other films by the Coen brothers, I do think it is interesting that bowling can offer a thematic reference.Buddha’s life was a constant struggle for perfection. Bowling, a seemingly simple game where a big ball is hurled at ten wooden pins—just knock them down twelve times in a row—is a symbol for this same goal. Coen brother films often use circular symbols or themes, so using a perfectly round ball to achieve a perfect 300 game, in rented shoes no less, is actually representative of Buddhist principles. It’s more a competition with one’s self than with an opponent.
from metaphilm.com
I haven't really considered the reoccuring activity of bowling in lg15 yet. But I am kind of interested to see other instances of bowling as symbolism (such as representing an "All American" activity for those in small/sheltered communities with not much else to do; the preWWII view of bowling alleys as a working class refuge of lower class values; the postWWII middle class American Dream of prefab houses in new suburbs with soda shops, diners and bowling alleys, which became more esteemed by the middle class; etc.)..
I wonder if, how and/or why bowling would reappear in this story (unless one of the writers just happens to be a fan of bowling or something...). Either way, this is a topic that I find interesting.
