Full body restraint.

The suit has many functions, each activated by a computer subroutine. You didn't like Lannah's snotty attitude so you decide to activate the most complicated and most experimental one. Humming softly to yourself, you tap a few keys on the computer keyboard then return to the window to watch.

Lannah's eyes widen as her arms cross over her chest as though she's hugging herself. The black latex flows and shifts, sealing her arms in place like a strait-jacket. "HEY!" she yells. "What the hell do you MMM! MMMPH! MNG!" she trails off as the mouth opening of the suit seals up, silencing her.

She twists from side to side, wrenching her shoulders as hard as she can. You had been worried that the experimental new material might tear under rough treatment like this, or that the subtle electronics could be damaged, but it's working perfectly. Suddenly Lannah topples to the ground. The suit has sealed her legs together, and she's lost her balance. Even though she can't break her fall the suit ensures she lands without hurting herself. She struggles and grunts uselessly as you prepare to load the next function.