We love this cat!
For this cat, whose name is Blu, the sound of crinkling plastic is just way too much for her to handle and she makes the strangest faces!
Luckily for Blu, though, you can see she is not distraught in any way. This particular sound is pretty harmless to her other than making her stick out her tongue and make silly faces.
However, for other cats, especially older ones, certain sounds similar to these have been known to have a negative effect on them so please be careful with your own cats when introducing them to a new sound.