You could put a Raptor on either side of the leviathan, and then deploy it so those flaps on the left and right stuck out. They wouldn't clip properly with the raptors, so the raptors would be underneath the flaps and could then fly up and fly the leviathan all around the level.
Since it's hard to shoot from a leviathan in midair, this was mostly useful for putting it on top of really high places. It was awesome.
That, and I can now safely hit the 'default' button when customizing my crosshairs and not lose every one of them (the only fix being to have a backup .ini file)