In If/Then, Idina needs to make a phone call, so she reached into her pocket for her cell phone and... nothing. She asked LaChanze if she could borrow her phone, and she starts digging in her purse, most likely to stall, when a character that quickly dipped offstage to grab the phone and hand it to her. Idina and the audience laughed and said, "It's live theater, folks." or somesuch.