PowerPointBingo is a game rather like BuzzwordBingo, where you list a series of annoying "features" typically present in PowerPoint presentations, such as "swirl text effect", "gunshot sound", "clashing colours", "dodgy title and/or end slides", "greying out points", "fade transition", etc., and attempt to spot them all during a presentation.  The first person to make a full house gives a subtle indication to the rest of the room, and is duly awarded kudos for second-guessing the idiocy of the presenter.
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See also ActivitiesForBoringMeetings