As is common in recently rescued bears, Bern's first encounter with wide-open spaces was a fearful one.
But he's come a long way since then.
Not only is Bern not afraid anymore - he's having the time of his life.
Last week, Vietnam sanctuary staff were delighted to catch him and new moon bear buddy Joe enjoying an epic wrestle - a key sign of wellbeing and friendship between bears.
Joe may have lost an arm - most likely to a hunter's snare when trapped in the wild - but that didn't stop him giving as good as he got with newbie Bern.