While Rio has taken a lot of heat for its relative unpreparedness as host of the 2016 Olympics, the competition at arguably the games’ marquee event—track & field—has so far avoided any major hiccups or controversies. But based on Olympic history, there’s a pretty good chance something might crop up before it’s all said and done.

From steroid cheaters getting caught and stripped of their medals to a Polish pole vaulter telling off the Soviets, we've compiled the 8 Most Controversial Track & Field Moments in Olympic History.