And Eiffel can see the bluff for what it is this time; he's zapped him twice for insolence and that makes a pattern, shows willing with no precursor or threat. The fact that he is threatening, now, fills Eiffel with a smug sort of hope that he doesn't try and hide.

Mouth is alive, with juices like wine! And I'm hungry like the wolf! Awooooooo!

It's a horrible stupid wolf howl but it gives him an unreasonable confidence, and he's going to keep focusing on making him let go of something. Hell, even his temper works at this rate.