Jimmy Gressier wanted to finish in style. And while he did cross the line in a memorable fashion, it was probably not quite in the way he intended. The French runner had an eight second lead on his nearest challenger, Germany’s Samuel Fitwi, as he headed toward the finish line of the European Cross-Country Championships men’s U-23 race, according to European Athletics, the organization that hosts the event. After grabbing two French flags from the sidelines, Gressier, the defending champion, powered toward a final patch of mud just before the tape. Attempting to slide along the mud and across the...