1 GM: Okay, a brand new gaming session! Hopefully we can get more done than last time.
2 Draak: Where we leave off?
2 Lambert: We were arguing with Kyros about fireballing the village.
2 Kyros: That wasn't my fault!
2 Alvissa: You were supposed to ambush a caravan!
2 Mordekai: Doesn't the Duke owe us money for that?
3 GM: {head in hands} Why do I bother....?

Ah yes, the recap, wherein it takes the players an hour to remember what they were doing in the last gaming session.

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2014-03-01 Rerun commentary: For this reason it's a good idea for the GameMaster to provide a quick recap at the start of a new game session, to make sure all the players are up to speed and remember where they are.

For a cool trick, try recapping with stuff that never happened and see how long it takes the players to figure it out.