sentence: There are several people getting ready to ski. sentence:  There's a person skiing downhill with full speed whose shadow can be seen. sentence:  There are people sitting and waiting on top of a mountain waiting to start skiing. sentence:  The skier going fast downhill is demonstrating how to turn and manage speed while going downhill. sentence:  There are some people walking toward the ski mountain on a escalator. sentence:  The skier continues to ski downhill steadily on steep and winding slopes.