Pelvic floor ultrasound examination in axial plane. The sling was minimally removed vaginally. Both ends however lie still close to the urethra and disturb the second sling in its function: the so-called collision phenomenon. The patient is incontinent. Tape 1 r.: the right end of the first sling. Tape 1 l.: the left end of the first sling. Tape 2: the second sling.