Except the Pinocchio song isn't quite as non-sequitur to the plot in the Ultron movie, and don't most people complain that modern trailers give away too much of the plot?
This is kind of blowing my mind because I only knew one person who did this, back when I was a teenager, and she was from Sweden and I never knew quite what to make of it. I always thought it was some kind of idiosyncratic-- you know, I don't know what I thought it was, but she was cute and I had a huge crush on her so she could probably do whatever she wanted