“I’ve spent a lot of time around bugs, whether for a film about mosquitoes, on the upper peninsula of Michigan filming bald eagles, or deep in Amazonian jungles. And they are indeed an issue when filming, especially with wide-angle cameras or small-format cameras, as each emphasizes or records objects, including dust and bugs, close to the lens,” Engel wrote in an email, adding that he’s resorted to applying bug repellant to a camera’s sunshade or enlisting a fan-wielding assistant to prevent insects from crowding a shot.

The KDVR UFO segment uses stylized, dramatic editing that seems to discourage objective analysis, and Engel notes that, with only the information available, “determining factually what’s going on is nearly impossible.” Still, his best guess is bugs.