sentence: People skateboard in a competition on the road while bending and holding his arms back. sentence:  Then, a skateboarder opens his arms and signal others to advance. sentence:  Then, the skateboarders pass on front spectators watching on side the road. sentence:  People take picture to the skateboarders. sentence:  A skateboarder fells on the road. sentence:  People continues skateboarding in the road.