The Stormers overcame a woeful first-half performance to defeat the Lions 19-17 thanks to a winning try from replacement scrumhalf Herschel Jantjies in the dying seconds.
The Crusaders made it two wins from two as they cruised to a 38-22 victory over the Hurricanes in a thrilling Super Rugby Round Two encounter in Christchurch.
The Brumbies and the Chiefs will both be hoping for better second-half showings this week, after they both gave up half-time advantages and were pipped at the post in their opening matches last week.