"It'd have to be a pretty small mountain, but..." she focuses for a moment, then jumps into the tree, one of the bendier branches creaking with the force she applies to it, then springs upwards again as she jumps, adding the spring force of the wood to the force her own chi-infused legs put into the jump, shooting into the air.
She doesn't go high enough to lose visibility, but at the very top of her arc you could have mistaken the odd blue and red smudge she makes for some kind of escaped kite.
On her descent, she reaches out to grab the tree branch again, bleeding off her kinetic energy as she arcs around the branch before dropping lightly to the ground.