Houston already knows this, so this is for the rest of the art-loving, trainspotting Texans that keep tabs on such things: Last Sunday a museum goer at the Menil Collection backed into a Cy Twombly sculpture and knocked it over. Everyone knows that sculpture is something you bump into when you back up to look at a painting. (Ad Reinhardt, comedian.)
John Hovig took the above photo and Robert Boyd posted it on his blog The Great God Pan is Dead.
And here is a nice picture of Dominique de Menil and Twombly in 1995.