Please choose the correct ending to complete the given sentence: Slacklining: A blue slack line is attached to two trees outside in an open field. on the line

Ending1: , people are riding in a tight line and sometimes crashing into other people on the line. Ending2: , a man is tied up to his bent over lawnmower. Ending3: , there is a man bouncing up and down while standing on the line before he gets off. Ending4: , dogs are lay out, ready to be removed by the owner on a blue slack line.

Answer format: ending1/ending2/ending3/ending4