Klemens Torggler's door is an invention based on rotating squares, The special construction makes it possible to move the door sideways without the use of tracks. This technical trick opens up new applications for the door.

The Offspring – We Never Have Sеx Anymore (Official Music Video). The Offspring is an American rock band from Garden Grove, California, formed in 1984. Over the course of their 37-year career, they have released ten studio albums. The Offspring has been labeled under multiple genres, such as punk rock, melodic hardcore, pop punk, skate punk, and alternative rock.

March of the Soviet Artillery (1943): Video – circa 1936-1947