Dutch BMX racer Niek Kimmann suffered a scary crash with an errant official during a training session at the Ariake Urban Sports Park in Tokyo on Monday.
Kimmann, a former BMX World Champion and medal favourite in the BMX racing in Tokyo, injured his knee as he flew down one of the course's jumps only to find a tournament steward standing in the middle of the track.
The 25-year-old ended up crashing straight into the official, with both hitting the tarmac hard.
"I hit an official trying to cross the lane," Kimmann wrote on Twitter. "Hope the official is OK. My knee hurts, but I'll do my best to be ready by Thursday! Thanks everyone for the messages, I appreciate it!"