WASGIJ? Original #44 - Wasgij Summer Games! 1000pc Puzzle

It's all ready, set, go at the Wasgij Summer Games. The crowd in the stadium are on their feet, the press and cameras are at the trackside, the athletes are... uh-oh! They're running all over the place! Something unexpected is putting our steeplechasers off their stride. What could the athletes have seen that's so distracting? Has all the training paid off, or is an unexpected competitor about to go for gold? That is the scene you will need to puzzle.