the best show i saw in 2010, and one of the most memorable art experiences of my life was This Progress by Tino Sehgal.  the work only lived for a short six weeks on the upper east side of manhattan.  i cannot imagine it anywhere else.  the perfect synthesis of concept, execution and space (a naked Guggenheim). it equally haunts and inspires me today as much as the day after i “experienced” it.