Partial constriction of the cytoplasm of a cell to form a furrow that resembles a cleavage furrow but does not complete cytokinesis. [ GOC:mah http://www.ncbi.nlm.nih.gov/pubmed/7729583 http://www.ncbi.nlm.nih.gov/pubmed/10751167 http://www.ncbi.nlm.nih.gov/pubmed/30990821 ]