When you have 2 faulty lighters, one with a working flint/spark but no gas, the other with gas but no spark. So you have to use both lighters to spark a joint in the ghetto.
Guy 1: Have you got a lighter?
Guy 2: It's a long ting, you have to use both these lighters.
Guy 1: That's cool, pass them here.
Guy 2: WOW! How you spark that splif so fast?
Guy 1: I'm a crackhead don't you think I've used a Ghetto Lighter before!