I can't even think about this movie. I don't WANT to think about it because if I think about it I will have to face an ugly truth that has been gnawing through my head...
This started out as a documentary on gun violence in America, but the largest mass murder in our history was just committed — without the use of a single gun! Not a single bullet fired! No bomb was set off, no missile was fired, no weapon (i. e., a device that was solely and specifically manufactured to kill humans) was used. A boxcutter! — I can't stop thinking about this. A thousand gun control laws would not have prevented this massacre. What am I doing?

Tears Down the West Side Highway. MichaelMoore.com (22 September 2001).