This is a cat that does not enjoy the sweet charms of flute music. Cats make up 80% of the internet (not a real statistic). Sometimes they pose with beer on Instagram. Some are good with babies, some are good with other cute animals, and some are pure evil. This cat is a mix of hilarious and evil, because it really, really, really hates the flute.
We can laugh because she is laughing. It is alarming that it appears to be a fair fight; that cat is really giving it to her. And when it recognizes the disparity between their weight classes, it compensates by taking a flying leap from the side. Never take that cat to band practice.