Dragging of two aggregate structures together by supercoiling of an extended fiber in contact with both. The images were taken from film sequence 1. A right-handed fiber attached to the surface of an aggregate structure swept clockwise around the aggregate from its point of attachment. In frame 3 it made contact with a neighboring structure, supercoiled in frames 4 to 6 and drew the neighboring structure to the surface of the initial structure to which it was connected. The two structures later fused together. This sequence illustrates the mechanism by which exclusion zones become established surrounding large structures.