The image humorously critiques the process of fact-checking by depicting a 'fact check' as a bus that is about to be hit by a fast-moving train labeled 'fact'. The train, representing an undeniable truth, seems unfazed by the 'fact check' suggesting that sometimes 'fact checks' may not hold up against strong truths or may be perceived as ineffectual.
People may find this meme funny or clever because it uses a scene from a popular movie to humorously question the intelligence or debate preparedness of a political figure, implying a lack of confidence or self-deprecating humor. The contrast between the character in the movie, who is known to be simple-minded and pure-hearted, and the preparation for a potentially complex and intellectual event like a debate creates a humorous juxtaposition.