Cape Town - French referee Romain Poite was accidentally knocked down during a European Champions Cup match between Leinster and Wasps in Dublin on Friday night.
A few minutes before full-time, Poite found himself at the wrong place at the wrong time and was felled by Leinster flank Rhys Ruddock.
The Frenchman lay motionless on the ground for a moment and eventually had to leave the field of play.
Defending champions Leinster began their campaign for a fifth European title in sensational style with an eight-try, 52-3 rout of Wasps as the English side suffered a record defeat.
WATCH the incident in the video clip below: