Lygia Clark - Mascara Abismo (Abyss Mask) 1968
from Nostalgia of the Body


Adrian Piper - Cornered (1988) on Vimeo.
Endlessly important work that i haven't seen in years and was reminded of yesterday. 
Considering this discourse in the context of multiple other pertinent discussions as well, even 25 years after it was made - it is still relevant.
More on her website.