None of this should surprise me.

[.. but it does, a little, not outwardly so since Kaiba can be a master at maintaining a flat expression.]

If he's smart, then he won't go trying that again.

[.. and this is why you shouldn't involve yourself in other people's problems. It did sound as if her actions, though extreme, were justified and who cares if a dream frog gets asphyxiated?]

If I'm wrong, then leave him to me. [The frog can be target practice.]