When your skin is so dark that it is a hazard to light. It is a similar to what happens to light with a black hole, the darkness sucks so hard that light cannot escape!
That Bangledeshi guy's skin so damn dark, he's a lighthazard.
When the leader of a punk group (the Alpha_Punk) denies that pot is addictive and tells everyone who questions him that he can stop at any time but does not want to. He then cites several studies which backs up his statements.
I'm not addicted, I just like to smoke pot everyday to calm me down. Even the Obama administration agrees with me that pot addiction disorder is a myth!