Ninja Tacks Make You Look Like Secret Shuriken-Throwing Master

This concept from designers Chromoly would be perfect if your boss is the pushy type, and you fancy unsettling them a bit: notice-board tacks shaped like Ninja throwing-stars. Just make sure you scream loudly and jam one in the wall near the door before they walk in, and voila: instant respect. Shame it’s just a concept: I’ve been practicing my shout already. [Designboom]