>>11034622Cheetah's alternate transformation as MERCURY's lower torso. It's not too different from the upper torso mode - basically, Cheetah does a handstand and its skirt armor/wheels fold onto the back while a peg flips out as a connector for Gazelle - but it's a bit back-heavy. The picture of hte combined MERCURY shows that the upepr torso is supposed to hunch over, so I imagine all the weight in Cheeta's backside in this mode is arranged as such to offset the front-heavy Gazelle's torso, but as-is the legs don't like to stand on their own very well. While I only have one Cheetah and can't actually confirm it, I imagine you should be able to combine two Cheetahs to make a full robot, though I can't guarantee it'll stnad very well due to the way the weight is distributed.
Also, since this and Box mode are the two modes where the robot head is intended to tuck into the driver's seat, it means the pilot has nowhere to sit in this configuration.