Board Thread:Versus Debates/@comment-27233105-20160130092635/@comment-9782468-20160203045503

It isn't even physically possible to perceive 72 hours in the breadth of a second either! Nevertheless, Kakashi did. Itachi stretched time for Kakashi, so Kakashi literally gained 72 hours of experience (torture) in one second. If he was a powerful Uchiha, he could've broken it during those 72 hours he perceived. Then he'd be out in a fraction of a second.

You can't argue what's physically possible or not in a manga like Naruto.