Please choose the correct ending to complete the given sentence: Slacklining: A guy rises to his feet. The guy walks on a tight rope. The guy turns to walk back. the guy

Ending1: sits on the rough sea floor. Ending2: walks backwards on the tight rope. Ending3: stretches in front of skaters. Ending4: straps his leg muscles into his shoes.

Answer format: ending1/ending2/ending3/ending4