The image you've provided seems to be a humorous meme that juxtaposes a text conversation with a sequence of four images featuring zoomed-in faces with surprised or odd expressions. The text at the top of the image sets the scene with a cashier saying, "The receipt is in the bag," followed by a response from the presumed customer saying, "You too." This textual exchange is the setup for the joke.
The first image in the sequence shows what appears to be a blue creature with large, startled eyes. This image is likely chosen to represent the initial surprise or confusion the customer feels after mistakenly using a common parting phrase "you too" in an inappropriate context. The large eyes emphasize the sudden realization of the awkwardness of the response.
The second image portrays a character with uncannily smooth facial features and two glossy eyes that create an impression of naiveté or simplicity. This could represent the blank or innocent state of mind the customer was in before realizing their mistake.
In the third image, there is a cat with a very human-like expression of alarm and wide eyes, which further underlines the shock or embarrassment the person might feel on recognizing their robotic, conditioned response to the cashier's routine reminder.
The fourth image is a close-up of a face with eyes and mouth slightly askew in a manner that suggests a frozen or panicked state. This is likely to signify the internal cringing that the person feels upon saying something out of context, as they mentally scramble to recover from the small social faux pas.
The humor in this meme comes from the relatability of the situation. Many people have had the experience of automatically replying with "you too" or a similar phrase in situations where it doesn't apply, such as after a waiter tells them to enjoy their meal. This automated, almost Pavlovian response to common pleasantries can lead to light-hearted embarrassment when the context doesn't match the reply.
Moreover, humor arises from the dramatic illustration of a small and usually inconsequential mistake through exaggerated facial expressions. The mismatch between the triviality of the error and the depicted level of shock or horror is a form of hyperbole, a common comedic device. It's an acknowledgment of the small absurdities of daily life that can momentarily throw us off, and it invites the viewer to laugh at the shared human experience of committing such harmless blunders.