Even the bravest of daredevils might find this clip tough to stomach.
This nail-biting video from a slacklining group called the Skyliners shows the team attempting to cross a slackline between two floating hot air balloons.
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The video description explains that no one managed to successfully cross the slackline, but the group is planning to try again. This gasp-inducing stunt is a collaboration with Spanish hot air balloon company Globus Kon Tiki.
Fear of heights or not, wobbling across that shaky wire is the last place we'd want to be.
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