The evenings during the weekends were amazing because all the special FAST lights went up. The festival was centered on the river, and as I walked back from Boston on the Charles Bridge on Saturday night I was lucky enough to see it. Unluckily, I didn't have my camera on me. And on Sunday night...well, I didn't really have the energy to go out again and take pictures. (Darn weather...had it been warmer, I probably would have gone).
I didn't actually witness these projections for myself, as I was sitting in my room by the time it got dark enough for the projections to begin.