more nails!
The first one has the "damping" set to 0.1 and there is quite a bit of bubbling in the nails even after they should have come to rest.
The second one has damping set to 1 and there is less bubbling but it might also be because the nails didn't build up such a deep layer. Notice that the motion only happens when nails are on top of other nails. Single nails on the ground stay put after they stop moving.
The third one is amusing for the one nail that gets somehow launched high into the air.
LessDampingMoreDampingBigLeap.mov
mp4 version:
LessDampingMoreDampingBigLeap.mp4