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OK here's my take. The "feet" are pneumatically deployed (look, you can see the cylinders). The "wings" are unfolded with what looks like a lead screw attached to the drill motors. Looks like a very inventive method for actuating the "feet". Thy appear to flip up out of the wings 270 deg (by first drawing the cylinder in then pushing it out). I'd also guess they can transfer some, if not all of their weight to these legs (hence the use of the drill motors).
Looks very ominous to us "non-limbo" bots!
See you at Ypsilanti!
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