Can self-propelled objects escape from compression stimulation?

We studied circular papers impregnated with camphor (CPs) and CPs with magnets (MCPs) as self-propelled objects floating on water under the compression of the water surface as an inanimate system for evacuation in an emergency. Two water chambers-C and C-were connected a plastic gate, and eight CPs or eight MCPs were placed on C. We monitored the movement of the CPs or MCPs from C to C when the gate was opened and the area of C () was decreased using a barrier.