The #koalachallenge is the new viral sensation taking off on Instagram! While others may seem easy this challenge is not for those with bad backs or weak abdominals. And that’s just the partner. One of the most physically demanding challenges yet seen on social media, it involves a person climbing around their partner without touching the ground. Like a koala climbing a tree. Source: PerthNow Looks easy but it is very hard! Look how hard this guy is concentrating!