[Spoiler] I Know Who We Are! I Finally Figured The Connection Out! (Stalker Also)

[SilentMobius]

If not Void energy, then something from Hunhow powered the Warframe, look 

here at 1:21 the moment Hunhow snaps, the Warframe falls back down in the exact same fashion is when the Tenno fell out of the chair, it's obvious the Warframe was powered by Hunhow.

 

I disagree, the Tenno succeeded in stopping the stalker from killing them and so released control of the Warframe. This is exactly the appearance I would expect if the Tenno was using everything they had to get the Warframe to help them, The Warframe could barely move, just push all the Void Energy the Tenno had left into the sword, harming Hunhow and causing him to force the Stalker to retreat.