Hitting the back button is unnecessary, just scroll down and you'll see the complete listing of replies in threaded mode. I prefer threaded since it lets me see exactly who is replying to who, and lets me quickly bypass posts by known morons. Flat mode frequently leads to people adding replies where it makes no sense to add them, leading to crossed wires, so if you choose this viewing method please be careful to note exactly who you are replying to. If I had a dollar for ever argument that got started because someone replied to the wrong post...
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"The devil I'll bring you," answered Hagen. "I have enough to carry with my shield and breastplate; my helm is bright, the sword is in my hand, therefore I bring you naught."