If they don't see anything happen they won't take action.

[which isn't implying that she's thought of doing something to someone out of their sight before, nope (yes it is).]

I'm pretty sure I know what metal shrapnel in a bone feels like... [she flinches when he yanks it out, reaching behind her to feel and... no skin broken! looks like the jacket did its job.] That's a no on paralysis. Right! Let's get this little lesson done.

[awfully cheerful for almost dying.]