Over 500 robots competed in soccer, boxing, and running. In many cases, gravity was the real winner. This week, China’s leading robotics minds gathered in Beijing for a hotly-anticipated, Olympics-style event dubbed the world’s first “ Humanoid Robot Games. ”

But the robots had other plans. During soccer matches, four mechanical players crashed into each other and collapsed in a tangled heap of metal limbs.

The World Humanoid Robot Games in Beijing, aimed at displaying humanlike robots’ skills at sports and everyday tasks, featured stop-start hotel bellhops and a maid that missed the trash bin.