Elephant and Rhino Cross

Alright, listen up, buttercup. This here joke is a play on words. So, you take the "el" from "elephant" and then you say, "El, if I know." It's like saying, "Hell if I know!" But, you know, with an elephant. You probably think elephants are heavy, but your skull is heavier, dense as all get out. Boom, roasted!