Interesting to go to Winter example then shift the lag-time (lefthand side). If you shift it 2 months, you get summer internships. If you shift it 4 months, you get summer camps. Five months, you get baseball. Eight months, you get spiders fleas and fire ants.
Doing a popular movie name gets other things related to that movie with shift=0, and other popular movies (or other things that spike like them) with shifting. Movie names were just the first very "spiky" thing I thought of to use as a filter like that, there might be something else better (short of loading a spike time series, of course).
