The respondents were passengers on a bus owned by Roman’s Transport CC and driven by its employee. While travelling at approximately 95 km/h on a straight road between Beaufort West and Aberdeen, the bus suffered a sudden and unforeseen blowout of its right front tyre. The bus veered to the right, became difficult to control, left the roadway and collided with a rock-cutting, overturning and causing personal injuries to the respondents. The respondents sued the appellant for damages, alleging negligence on the part of the driver, specifically that he failed to apply the brakes timeously or adequately after the blowout. The appellant denied negligence, contending that the collision was caused by a sudden emergency created by the tyre blowout and that immediate braking would have resulted in loss of control.