How Do We Know How It Ends?

Last night we went to see Bad Teacher when the theater lost power when the movie was about 20 minutes away from ending. Every movie in the theater was interrupted and the line for a "rain check" was way too long. So, the question remains: how do we find out how it ends? Has anyone seen it? While it wasn't anything Oscar-worthy, it was enjoyable enough to want to see how it all played out. Has anyone seen it? Help!