A similar exercise as below, in which I drew whatever came to mind. I was waiting for my son at one of his various activities I chauffeur him to, when I began drawing the power lines visible at the top of the page. This inspired the gangster theme (naturally). I wish I'd gotten around to inking the saxophone dudes at the lower right.
It's fun to ink this way- it's a nice way to hone your inking instincts without worrying about a big train wreck.