Oscar Pistorius has shown the court what mobility he has when he is not wearing his prosthesis.
ITV News Africa Correspondent Rohit Kachroo reports from the Pretoria court:
Judge and her assessors walk across the courtroom floor for closer inspection of demonstration, which will not be televised
Pistorius sitting on a chair next to his bathroom door - close to witness stand. Witness, judge and assessors huddled around defendant
Versfeld is kneeling in front of Pistorius explaining to the judge how his heel pads can slip. Judge and assessors now return to seats
Oscar Pistorius' defence will open their case on Friday and the Paralympic and Olympic athlete is expected to testify in the morning.
Oscar Pistorius was "probably not wearing his prosthetic legs" when he fatally shot his girlfriend, a forensic analyst told his trial.
Reporters discuss their views on the evidence while trays of coffee are passed along. At times it feels more like a cinema than a courtroom.