Thylacoleo are capable of pinning down flyers in mid-flight (anything but the Quetz and Wyvern, I believe), other Thylacoleo, and even Therizinos. You can also jump from object to object by holding down the jump button while pouncing from a tree or cliff (have to hit it at the right angle, however). Upvote to inform others!
Can climb up thick redwood teees and steep, vertical rocks. It can also pounce from the tree and pin small creatures and flyers to the ground, in a PVP server, tame one so if someone flys past you in the redwoods without paying attention, give them a heart attack by pinning their mount and knocking them to the ground.