Home People Gu Seong-mok Gu Seong-mok movies Gu Seong-mok movies Gu Seong-mok Movies (7) Metamorphosis (2019) As Executive Producer. The Witness (2018) As Co-Executive Producer. The Phone (2015) As Executive Producer. The Neighbors (2012) As Executive Producer. Pained (2011) As Executive Producer. Try to Remember (2010) As Executive Producer. Beastie Boys (2008) As Executive Producer.