This one took a long time. SIFT found a lot of features in each image, and the homogeny within the scene meant lots of incorrectly identified feature matches. Later stages of the alignment algorithm rightly discarded these incorrect matches, however, and all the source images were aligned correctly in the panorama (eventually) generated.
The Blair Witch Project is a pretty good movie. I don't know why people are so hard on it just because snot comes out of the girl's nose at one point.
