I went down to the market where all the women shop;
I pulled out my machete and I begin to chop;
I went down to the park where all the children play;
I pulled out my machine gun and I begin to spray.
According to Josh Stieber, who was granted conscientious objector status upon his return from Iraq.
Update: A repentant ex-Army writes that he is ashamed he sang this additional verse:
I went to the mosque;
Where all the hadji’s pray;
Pulled out a claymore;
And blew them all away.