Low angle of young barefoot man wearing black jeans and puffer coat walking on, then falling off slack line

slackline slacklining slack line tightrope balance test falling balancing balance home exercise climbing active exercise green stretch low angle physical slack tighten barefoot grass sky sport fitness sun activity jitter low sunny wobbling blue sky trees wobble bush bushes tree tie tight bright tension shed home blue leaves silver barn birch ratchet puffer silver birch