When they reach a bridge, they have to wait for Woodies to pass, but when they do, Lok blows up the bridge, and the Woodies attack. When Tak saves Lok, he summons Mind-Reader Juju.
As they approach a bridge, they need to wait for the Woodies to cross before Lok destroys it, triggering an attack from the Woodies.  When Tak rescues Lok, he calls upon Mind-Reader Juju's powers.