Every day billions of cells die in our body and need to be replaced by newly dividing cells. Cell division is a beautifully orchestrated process that involves multiple critical steps. At the very end, “cellular abscission” splits the membrane and thereby gives birth to two daughter cells. Abscission is executed by a protein machinery named ESCRT-III. ESCRT-III consists of many subunits that form spiral-shaped filaments to constrict the membrane tube connecting the daughter cells until it splits. Insights into the function of ESCRT-III are also interesting for many other biological processes – as this machinery also pinches off viruses from the host cell membrane, and seals holes in cellular and nuclear membranes.