Naughty Baby Rhino

One day there was a mother rhino and baby rhino getting sent to an African Zoo."I'm very tired,'' yawned the calf.'' Can I sleep on your horn?''
"Alright then,'' grunted Mother Rhino.''But don't use all of your weight because I'm tired as well. Thud.
"Ouchieeeeeeeee, "squealed Mother Rhino."Get off me now."