user
Given a cartoon image and a caption. Caption: We're really looking for someone with more lab experience. Question: Generating an explanation of why this image/caption combination is funny. Answer: 
assistant
The turtle is applying for the job of running in the mouse wheel, but because turtles are not as commonly used as subjects in laboratory studies, its application is gently rejected. It's a play on the term "lab experience," which in a usual job application for a research position might refer to hands-on experience conducting experiments, but here refers to hands-on experience being a test subject.