Machete shooting rifle slingshot

This handy gentleman has built an (arguably ill-conceived, but nevertheless impressive) rifle-cum-slingshot that fires machetes, should you find yourself with the need to fire machetes. He also has a sideline in selling parts for making your own insane slingshot-like inventions.

Styrofoam cloud ring

Designer Baiyang made this funny (albeit impractical) and lovely cocktail ring out of sterling silver and polystyrene. 
Is it a good engagement ring?

HOWTO make a pixelated trash can

Instructables user BrittLiv has a fairly intense HOWTO for making a pixelated home trash can made from hand-painted woodblocks and plywood. It's a lot of work, but you can't argue with the results!