Sound dumb, not forgetting aeronautically implausible? You bet. But Grey, Functioning from a script by Daniel Kunka, is familiar with just simply how much he could possibly get absent with. Grey is a brilliant, functional director: his 2003 version on the Italian Job (also established and shot partly in Venice), https://www.greathomesaz.com/the-ultimate-guide-to-attic-lift-systems/