Imagine going to a Bears game and, instead of sitting in the stands, standing on the sidelines in uniform. Or tossing towels to Mick Jagger backstage at a Rolling Stones concert. Or taking a punch from Will Smith in a summer blockbuster while wearing a rubber alien suit. That’s what Edward A. Voci does when he goes to the Lyric Opera of Chicago. Voci, a civil rights attorney and adjunct professor at The John Marshall Law School’s Fair Housing Clinic, is an extra, otherwise known as a supernumerary. These …