PowerPoint Karaoke, also known as
Battledecks or
Battle Decks, is an improvisational activity in which a participant must deliver a presentation based on a set of slides that they have never seen before. Its name is derived from Microsoft PowerPoint, the world's most popular presentation software, and karaoke, an activity in which a performer sings along with a pre-recorded backing track. The effect is intended to be comical, and PowerPoint Karaoke can be considered a form of improvisational theatre, or a type of Theatresports game.
Read more on Wikipedia -
http://en.wikipedia.org/wiki/Powerpoint-Karaoke
So you went to some event and they did PowerPoint Karaoke and it was tons of fun.
Now you are sober and want to do it again with another group of people.
Its your lucky day - here's a collection of some good decks.
On the 500th time a friend asked for the material I decided to put up this page.
Suggestions: 
