Providing a cat “more comfortable way to get into the garden,” YouTube user CrazyMrJohn has popular video on the site of a lift “fully operated by the cat” using an “infrared catflap.” I have to assume the kitty breaking an infrared beam makes the “cat-lift” begin operation. but I can’t be sure of the particulars.
This custom lift’s not the only one to help a cat to change floors like a person. This video shows a cat that has apparently figured out his apartment building’s elevator. As is always the case for YouTube and cats, there are more examples in the “Recommended” section!