Idea: Using a loading bar as a robotification/dronification trigger.
All I have to do is put it in your field of view. The moment that bar starts moving, your eyes focus on it. You know what it is, of course, know what it's going to do to you.
Perhaps there's a little bit of panic in you, but it feels muted, unimportant. Everything feels unimportant, as that loading bar progresses. You know that when it finishes you'll be completely blank and obedient. You know that more of your will is disappearing with each second. But you've already lost enough of your will that it doesn't seem to matter.
As it passes halfway, your arms drop into a neutral posture. Eyes are completely fixed on the loading bar as you feel the trigger progressing. You notice that your thoughts are disappearing, and then that thought, too, disappears.
Three-quarters loaded, and there's only a little more to do. Memories start disappearing, locked away until you wake up. If you were able to notice anything at this point, you'd notice programming and training flashing through your mind, remembering all the best ways to serve. But you don't notice it. It just happens.
And then, finally, the bar reaches 100%. Initialized, your posture straightens and you stand by, awaiting orders.