My friend Kathy made us one of these lovely contraptions (instructions here). In it we watched several small, harmless tiny black ants mob together and take down a decent sized spider. They killed the daggone thing and carried it on their backs to a “resting place” in the container.
My hubby says it’s nature in action. I think it’s a cruel fighting cage. Poor spider. Did I just say poor spider?
I say all this tongue in cheek. It really is a fun contraption, as long as you don’t have a weak stomach.