TESSAN Premieres 'Jump Into The Unknown' Documentary, Chronicling Jamie Leibert's 30-Day Expedition in the Swiss Alps

<p>The film follows professional adventure athlete Jamie Leibert and his wife Sandra as they navigate changing conditions and unexpected challenges to rethink what makes an adventure truly worthwhile. NEW YORK, Nov. 1, 2026 /PRNewswire/ -- Before leaping from a cliff, Jamie Leibert pauses...</p>