A frog named Kermit Jagger walks into a bank and asks to speak to the loan officer. He is directed to Patty Black's office.
Kermit introduces himself to Mrs. Black and mentions that the bank manager knows his dad, Mick. He explains that he needs a loan and Mrs. Black asks him what he has for collateral. He places a statue of a small silver elephant on her desk. Unsure, Patty says she'll have to talk to the manager.
She walks into the manager's office and says, "I've got a frog in my office named Kermit Jagger. He says you know his dad, Mick. He wants to use this elephant thing as collateral. I don't even know what it is!"
The manager replies,
"It's a knick knack, Patty Black, give the frog a loan. His old man's a Rolling Stone!"