I don't know if this is what you wanted, but here goes:
Stage right is Peter in his dorm room (only major set piece is his wooden desk, with a framed picture of his mom and him). Peter, standing, calls his mother Claire with his cellphone. Stage left (once the spotlight comes on) is Claire, who answers with her cellphone.
Pretty much the rest of the song is done with them standing at different ends of the stage (although Peter is more stage-center), conversing over the phone.
When the song ends and Claire begins "Warning," the lights dim on Peter, and he gets bathed in a blue afterglow light. While Claire continues to sing, Peter takes the framed picture on his table sits down on the floor, his back against his desk. For the rest of the song, Peter is sitting on the floor, staring at the framed picture. Right before Claire finishes her last line, he gets up, brushes off his pants, and exits upstage.
BlueWizard's blog: The Rambling Corner
HEDWIG: "The road is my home. In reflecting upon the people whom I have come upon in my travels, I cannot help but think of the people who have come upon me."