I hope I'm not violating a rule or anything by doing this (I'm new here), but seeing several people mention Batarangs reminded me of something.
http://www.kendalldavis.us/catalog/artbooms.html
^About halfway down the page, right underneath the tiger striped boomerang is...yep, its a Batarang. Granted, its rainbow, not black...but it does work.
http://www.kendalldavis.us/catalog/artbooms.html
^About halfway down the page, right underneath the tiger striped boomerang is...yep, its a Batarang. Granted, its rainbow, not black...but it does work.