Please choose the correct ending to complete the given sentence: Slacklining: A river is shown and then different buildings with the clouds moving and music in the background. two men

Ending1: hold the capoeria of a rock band and they rock as people walk by in a plaza. Ending2: are talking in a field formation while arrows point to signals and videos on wall tops for shooting arrows. Ending3: are set in front of the camera playing a set of bagpipe pipes. Ending4: are seen walking on a sidewalk and then talking inside a building, and then on a roof attaching equipment with ropes and pulleys.

Answer format: ending1/ending2/ending3/ending4