SOME PEOPLE MAY THINK modern art is a little strange, but one London worker really thought it was rubbish. A cleaner on the night shift at London's Tate Britain gallery threw out a paper-filled clear bag of garbage that was part of an art piece by German-born artist Gustav Metzger. The artwork, “Recreation of First Public Demonstration of Auto-Destructive Art,” was displayed next to an acid-splattered nylon sheet and a metal sculpture on a table. The gallery said that the mistake was made the day before the exhibit's opening. Although the art was recovered, Metzger had to replace the trash bag because of damage. Now, the exhibit is covered nightly so that the vital garbage bag won't end up in the trash again. What do they do about all the other exhibits, though?