Don't you hate it when people invade your personal space? Perhaps that's the reason for this Chewbacca like shoulder strap that's equipped with a laser on the shoulder. Zac Ong's creation will create a laser perimeter letting people know when they're too close.

The wearer's shoulder is a spinning laser that creates a visible 360 degree personal zone, and should they dare invade that space, an infrared sensor located on the chest will detect their presence and activates blinking LEDs, and random spinning contraptions.

Looks like a good tool to wear in a comic con setting. [Zac Creation via PSFK]