One of the nice things about volunteer design work is that we usually (not always, mind you) get to do something that we think is cool. This year, the local elementary school's fall festival was adding a bunch of new games and a new attitude and wanted a poster to reflect it. The upside down leaf is a fine symbol for fall, simple and clean, so we adopted it as one of our two design constants that we used throughout a series of posters relating to the event. The other was the autumnal color bar on the left of each poster.
One other art directorial note here: sometimes when we get a long list of items to include in a printed piece, we like to treat that list as a design element rather than a list with bullet points or dashes or what-have-you. That's what we did here with the list of activities one could play at the fall fest. We think it not only looks great, but also is actually more inviting to read than a plain old stack of stuff.