Finally, the joker’s manic unpredictability means he can and does appear at any moment. Just when you think he’s been stopped, he returns. This is definitely the way the volunteers feel about picking up the cigarette butts from the beach. Just when you think you have cleared a space of them, you find two more. They decompose at such a slow pace that the ones that do not reach the sea, get buried under the sand. This results in ones that have been hidden for months, resurfacing to cause further damage. The ones in the sea will often lie on the bottom of the oceans for years.