A) He can be detached from that thing just by pushing really hard? It seemed like he'd been Borged/Zerged/whatevered into a different creature.

B) She could tell just by looking where to shove?

C) If she could get them to go between nigh-invincible monster mode and back at a whim, why WASN'T this her original plan, and why did they have to stumble onto it by accident?