The best films, in my opinion, are those which challenge your conventions and beliefs and really make you think. Slam did that in Spades. I was completely lost in it. The cinema-verite style (the film was shot remarkably like a documentary) completely drew me in. Slam will stick with me for a long time to come.
Also, anyone who knows Washington, D.C. will recognize that this was a great use of D.C. as the setting for a movie. Usually D.C. is used as just a pretty backdrop, but in this movie you saw real sites like the Projects of Southeast and Capitol Hill's Eastern Market, and recognized that D.C. is a city of real people and not just a place aliens blow up.
Also, anyone who knows Washington, D.C. will recognize that this was a great use of D.C. as the setting for a movie. Usually D.C. is used as just a pretty backdrop, but in this movie you saw real sites like the Projects of Southeast and Capitol Hill's Eastern Market, and recognized that D.C. is a city of real people and not just a place aliens blow up.