It's like the cat accidentally ate wasabi thinking it was green tea ice cream.
It's especially funny because cats generally seem to enjoy bad smells. It's not like they're picky about what they put in their mouths either, since their cleaning strategy is "lick butt until clean." This cat tries to battle the disgusting foot, but it can't even fight with its mouth. Every time it tries to bite those toes again it remembers, "Oh right, this terrifyingly awful taste is what I'm trying to destroy in the first place!"
In the end, the brave animal falls. Is this what victory smells like, Stank Foot Guy?