[ McCree goes ahead and brings up the video for her. He holds his bracer out at a comfortable viewing angle and lets it play through before explaining. ]

I was looking for something to stop things from getting into or minds and memories. Then I see Leon's left the key in the door to the restricted section, so of course I gotta take a peek. This 'Bulwark Shield' seems like it might do the trick, but I sure can't understand the formula or whatever it is. I went to ask Lucas about it and he said it's impossible to do.

[ He shakes his head. ]

I don't buy that. Why have an animated book that shows it if it can't be done?