I've seen some videos of FWC eating on YouTube. The response very much reminds me of my Yellow Tail cribo, crazy back and forth shaking of the rodent with the whole upper half of her body, which reminds me of a largemouth bass jumping out of the water and trying to get rid of the hook.
My retics are much, much calmer. The closest comparison is my Egyptian cobra, but her furious strike is just to grab the rodent and then she jerks it back into her Petsmart cave without the crazy side-to-side shaking of the head.
I may get a pair of FWC if I find the room down the line.