[DouglasCole]

The penalty for being held with nothing to push off of should be similar to being in free fall without the nausea effects. That's -5 to DX, and (rounding up), -3 to Parry and Block. Since the free fall skill also impacts HT, that makes it a flat -3 to Active Defenses.

That makes "suspended in midair" like this on the Posture Table:

Posture Attack Defense Target Movement
Suspended -5 -3 Normal None
Lying Down -4 -3 -2 1 yard/second

So it's a bit worse than lying down for attacking, equivalent for defending, you're no smaller a target than you were standing up, and have no purchase so you can't move.

The Free Fall skill helps you buy this off; it'd be somewhat legit, I think, to treat this as a technique rather than a skill, since the only purpose of Free Fall is to buy off a penalty, much like Ground Fighting. Make it a Hard Technique like ground fighting.