The phrase “seeing pink elephants” is a euphamism for drunken hallucinations. Jack London first used the phrase in 1913, and the idea of being so wasted that you hallucinate has stuck. The pink elephant in Duke 103’s graffiti mural is having a great time though. He’s about to eat that darned mouse that he’s been afraid of all this time.
See more colorful murals by Spanish street artist Duke 103 in Duke 103’s Graffiti Characters Own Spain’s Street Art Scene