The image is a play on words, visually depicting the phrase 'before it bit', as if to suggest someone should hit 'it' before it can bite them. The humor comes from the literal interpretation of the phrase, with stick figures and the letters 'i' and 't' represented as characters, and the 'i' hitting the 't' which changes the context from the saying 'hit it before it bites' to 'before it bit'.