Crazy scene at the Tour de France Femmes on Thursday ... when a crash resulted in a huge pile-up during Stage 5 of the event, requiring one rider to be taken away in an ambulance.
It all went down with about 28 miles left in the race -- when two riders made contact with each other ... causing them to wipe out.
The crash sparked a domino effect, with 30 riders getting tied up in the crowd.
Somehow, most riders were eventually able to get back up and finish the stage, but Movistar's Emma Norsgaard required further medical attention and was taken away from the scene in an ambulance.