I learned that, when staging a public competition, you can just arbitrarily make up rules on the fly in order to disqualify contestants you don't like.
I learned that four teenagers can have trouble coming up with $5 among them to meet a minimum order.
I learned that motorcycles cannot go on roads.
I learned that one of the consequences of early middle age is that, when you see a teenager in a movie doing a lot of bike stunts on piles of lumber, you get preoccupied at how unsafe all this is and how much you wish he were wearing a helmet.
I learned that Lori Laughlin playing a character discussing college options opens up a very rich vein of riffing potential.
I learned that in some small towns, they add unnecessary adjectives to describe the activity of sliding.
I learned that the stock 80s character of "cocky blonde rival athlete" can actually be a good sport.
I learned that losing a single match can destroy the career of a high profile BMX star.
I learned that something happened in the 70s that drove some woman to name her daughter "Wesley" and her son "Crew".
if I did not know better, I'd think that this movie attempted to have symbolic sex between the maie (Cru) and femaie lead (Lori, I think) several times. Sort of "BMX-sex".