It's tempting to watch If a Tree Falls doc about a scraggly group of ecoterrorists with a chip of skepticism on your shoulder. Yet the film creates a fantastic moral ambivalence.

Curry tells a compelling tale about the differences of opinion over what constitutes desperate measures, and how readily we throw around a term like terrorism.

The problem is that the heart of the movie is McGowan. He's just not a very compelling figure.

Yet, it asks difficult questions of activists who object to what the wider electorate has apparently condoned, convinced they'll one day be seen as heroes.