There was confusion on the rugby pitch on Friday night as a new rule for all players to wear smart mouthguards caused interruptions to the game.
During the Super Rugby match between the Chiefs and the Crusaders, Quinten Strange and Anton Lienert-Brown were both ordered off the ground for head injury assessments, due to alerts from the mouthguards.
Both Strange and Lienert-Brown appeared confused and frustrated by the decision.
They were eventually allowed back onto the field. There's been a suggestion the issue could have been caused by a dodgy Bluetooth connection.
Former All Black Jeff Wilson spoke to Corin Dann.
