Mako and the girls made it out of the cave just in the nick of time and the Terra Beetle King was left confused as to how could its prey escape when it had damaged them so much.
The cave entrance was a couple of feet above the ground so as soon they left the entrance they would fall down a bit. Normally it wouldn't have been an issue as they were strong enough to fall that height without a care in the world; however, this time the case was different.
If they were to land on the ground normally, the shockwave from the landing would definitely be enough to rip apart the stitches that were holding together their fragile skin.
Mako was the first to jump as he fell down with speed. Using his fire ability, he released his aura as pure flames from under his feet which created thrust. The thrust countered the falling force just enough so that Mako landed gently on the ground.