In 1955, Jockey Briefs ran an ad campaign featuring young boys shoving guns into their underwear. The image on the left is via vintageskivvies.com, who says that it ran in Woman's Home Companion; the one on the right is from eBay.
A 73 year old man teaching a conceal carry class in Ohio made the cardinal mistake when handling a firearm. He thought the gun was empty and dry fired it without checking. The bullet that was, of course, in the gun ricocheted off a metal desk and struck a man taking the class. Not a class to teach by negative example.
Paul once posted about a camera that looked like a gun. This does that one better. It's a camera AND a gun. Pull the trigger and it simultaneously takes a picture of and shoots a bullet at whomever you're aiming the gun at. It was created and used in the late 1930s in New York City. [via petapixel]
After firing his assortment of guns under water Andrew Tuohy collects the bullet 'blossoms' and makes what he calls tactical flowers for his mother. Both the pictures of the guns being fired and the flowers made from the bullets, pictured at the link, are artistic and beautiful.
A shotgun shell that is a self contained tazer has been in development for several years and is now being offered to law enforcement for use. There is a specialty Mossburg shotgun that can be bought with the shells but they can be fired from a standard shotgun as well. Non-lethal force that can be used at a greater distance than regular tazers, this could be safer for both cops and criminals. Besides, its a neat piece of tech. For more info go here.