Bigfoot seems to pop up in a lot of places, but he sure is elusive when it comes to having his photo taken.

At just 19 years old, Alex Mason is one of the youngest phenoms in slacklining. He’s traversed the globe to compete, winning the Teva World Cup and the Slackline World Championships, all before he graduated high school. For his biggest project yet, he teamed up with his mentor, “Sketchy” Andy Lewis, and a Redbull film crew to trickline his way through the world’s first “slackladder” — a term coined by Redbull.

There are hundreds of Bigfoot sightings every year, but some are more far fetched than others. These are our picks for the most believable Sasquatch encounters to ever occur.