Comment by nine_k
Tannerire, when crushed, initiates a small explosion, which triggers the C4. When a python swallows a rabbit, it then crushes the rabbit's body with its powerful muscles, to help the digestion. This is when the explosion would happen.
This is my best understanding. I have no idea where inside a rabbit there would be room enough for the C4 and tannerite, and how to put it inside enough rabbits.
From what I’ve read a .22 caliber bullet or heavier is necessary to ignite tannerite. I’m not a herpetologist, nor a firearms expert, but I have my doubts that a python ingesting prey produces similar forces as a .22 striking a target, at least in terms of force per area.