Come on. As if she wasn't saying that to herself, and she grits her teeth. Come on, because you're meant to protect humans, and now you're just frozen up. Fear isn't rational, can't be, and there are probably people who would argue Jules isn't rational at the best of times.

Jules grits her teeth, tries to estimate where the sound is coming from when it keeps drifting, and the needle getting through the shield is the last straw. With something like a growl, a sound she'd rather ignore ever happened because it's another part of that, she hurls the metal lid. Monster strength, it can come in useful, but only if she manages to actually hit something.