Psionic Tornado: Knockback or Knockdown?

Before I get this power and regret it, just want to check whether Psionic Tornado does knockback or knockdown. Seems like I've seen both listed in different places. Flinging a spawn every which way would definitely be counter-productive to lining up my cone attacks lol...but it would be nice to have it for the AE damage and -recharge.

It does knockup : similar to knockdown, but takes them slightly longer to actually hit the ground.

I *think* knockup also has the advantage of not turning into knockback when used on enemies weak against knockdown/back powers (e.g. clockwork tend to get knocked back where other enemies are knocked down), but don't quote me on that part.

Cool, thanks! I'll definitely give it a try.