British-based conceptual artist Martin Creed produced a work for the Tate Britain in 2008 called Work No. 850. The work consists of athletes running through the gallery at timed intervals. Of his work, Martin Creed says:

Running fast is like the exact opposite of death. It's an example of aliveness.

I think there's nothing more minimal than impermanent, temporal work that discards the material, and has no physical consequences on the space where it is installed. And what a better medium to achieve this than performance art?