A fictional weapon used in the game Mafia Wars seen on Facebook.Based
purely on an observation of the drawing, It seems that it works
like a pin cushion, where
by one lays the trap hoping their target will sit/step on the spring compressing it and pressing the sharp object
into their flesh.
Bloody Webby, None as the device
is purely fictional. The real world application would be best akin to the punji stick.
For definition see wikipedia "Punji_stick"