Dixie is seriously bursting to pee. She has been holding it for a long time and she can't wait much longer. As she approaches the point where she knows she will wet herself, she lifts her skirt and pulls down her tights and panties so that she can pee into a glass cylinder, just to see how much she was holding. (This clip is the last 7 minutes of the Bound2Burst movie Waits & Measures).