I don't think it's a specific movie reference. He just does it because he's ashamed of what he is and never intended Marge to see him like that.
It's similar to when in "Like Father Like Clown" when the Rabbi walks in on the young krusty using seltzer in the bathroom, Krusty kind of turns away and shouts "shut the door!"











Heckling a Puppet show.

) He was a lifelong CBS news correspondent, who, during his last 15-or-so years, became noted for his CBS Sunday morning segments, “On the Road with Charles Kuralt.” When he began these regular spots, the heavy, bald, avuncular correspondent bought a Mobile Home, and he regularly traveled across the U.S. looking for odd little “slice-of-life stories” about small-town people in America.