Ten Really Dumb Old Inventions and Their Really Dumb Modern CounterpartsJesus Diaz10/22/09 8:00am261EditInvite manuallyPromoteDismissUndismissHideGo to permalinkHookay. So, you think that this M3 sub-machine gun—with a shoot-first-and-ask-later curved barrel—is a really stupid, really dumb invention, right? I don't blame you. But, trust me, you don't know what really stupid, really dumb inventions are. Yet.