By splicing two unrelated scenes together, these GIFs are given a whole different meaning. For instance, consider someone shaving dead skin off their feet merged with some footage of parmesan cheese.
Yup, you get the idea.
Film scenes are given added humour or twerking is turned into something quite upsetting indeed. As you watch them you'll be impressed by the skills involved in such accurate splicing (the cream one for instance), along with being grossed out and highly amused.
Long may people continue to practice the fine art of the merged GIF.