Carl Wheezer is the nervous, llama-loving best friend from Jimmy Neutron, the Nickelodeon animated series about a boy genius and his friends. His exaggerated vocal reactions became easy meme material because they are easy to recognise even without seeing the show, and short clips of his voice began circulating in reaction videos and edited memes. The ahhh in particular stuck around because it fits so many everyday moments, from food and crushes to small victories, giving creators a ready-made goofy ahh sound for an overexcited response.