I stumbled upon this video while doing my periodic YouTube search of the keyword "Jehovah". In the video a JW (actually two JWs, but only one does most of the speaking) debate an atheist.
The atheist is a mild-mannered Iranian who at first seems deceptively easy and clueless (I think it has to do with the fact that English is not his first language), but soon proves he's no walkover - calmly, mildly and civilly. He gave some excellent arguments refuting the JWs' argument from design and argument from fine tuned earth. He even exposed their special pleading for the existence of a complex god lacking a designer right back onto them by applying it to the existence of the universe!
The JWs were not able to offer any meaningful rebuttals to his points and ended up resorting to the fallacious argument from final consequences. At times you get the sense from looking at the JWs that they inwardly realize he's making good points they can't refute.
Enjoy: