I guess they are filming Scott Pilgrim vs. the World in front of my house. I am not 100% sure this is the movie they are doing, but I saw Michael Cera with an Asian girl standing across the street being filmed.
I think the funniest thing for me is the fact that they are making it "winter". First they put down a bunch of white foam and then, just before filming covered everything with ground up ice shot out of a truck.
Here are some pics. I will add some more as the day progresses.