This is a video from the PressTube Youtube channel of a bunch of disposable lighters (the video title says 500 but I didn't count nearly that many) getting tossed into an industrial shredding machine, which has a Zippo on each side to ignite the escaping butane as the lighters are crushed. Man, I only wish I could have been there to smell it. And, okay, maybe cook a couple hotdogs on a straightened coat hanger.
Keep going for the video.
Thanks to Jeffrey S, who agrees clearly someone doesn't know how to use a lighter.