I stood on my knees in front of a concrete debris for two hours to honor victims of Riga supermarket roof collapse (link worked 2014-Aug-13), because supermarked was built by Lithuanians. It was ca. -8° C (17.6 F). I call it actionless performance. Coincidentally president of Lithuania visited site of tragedy the same day.
TV news reportage
Happened at Riga, Latvia, Līvu laukums, 2014-Jan-17.