A frog walks into a bank and approaches the teller, a lady named Patty Wack. The frog says, "I'm Kermit Jagger - you've probably heard of my dad, Mick Jagger - and I'd like to borrow $5,000."
Patty says, "We'll need some security to give you a loan. What do you have for collateral?"
The frog pulls a ceramic figurine out of his pocket and hands it to Patty. Confused, she calls in the bank manager.
"This frog claims to be the son of Mick Jagger," she says, "And he wants to borrow $5,000. But all he has for collateral is this little figurine. What is this, anyway?"
The manager looks at the figurine and says, "It's a knick-knack, Patty Wack. Give the frog a loan. His old man's a Rolling Stone."