This demonstration made me think of some beautiful experiments conducted in Copenhagen by Torsten Ingemann Nielsen in 1963 called the alien hand experiment. Here an observer also lets visual input override proprioceptive information, as an experimentor through the use of mirrors manipulate the visual feedback of the observer (see fig 1 in Gallagher & Sørensen 2006).
Nielsen, T. I. (1963). Volition: A new experimental approach. Scandinavian Journal of Psychology, 4, 225–230.
Gallagher, S. & Sørensen, J. B. (2006). Experimenting with phenomenology. Consciousness and Cognition, 15, 119–134.