My friend Steve and I had seen advertisements on television for a new movie that was coming out to the theaters.  We waiting until opening day, and went down that night to buy our tickets to watch the show.  We waited in line for several minutes before we were able to pay for our tickets.  Once we had our tickets we got in line to buy some snacks.  I ordered a large popcorn with extra butter and a large Coke.  Steve ordered a medium popcorn with butter, some peanut M&Ms and a large Dr. Pepper.  Once we had our snacks we handed over our tickets to the usher and walked into the theater.  We carefully scouted for just the right seats.  When we found the perfect seats, we sat down and watched the movie previews to see what new movies would soon be coming out.  Once the previews were over, the theater darkened and the movie began. 
Question: Why did they see that particular movie?
They saw the ads on television.