"The frog in the bank" joke

A frog goes into a bank and approaches the teller, whose name is Patricia Whack.
"Ms.Whack," he says, "I'd like to obtain a loan to buy a boat."
Patti furrows her brow and asks, "Well, how much do you want to barrow?"
"$30,000," the frog says.
The teller writes this down, then asks his name.
"My name is Kermit Jagger.I'm the son of Mick Jagger."
"Really?" she asks, eyebrow raised.
"Yes,"he says. Then he digs into his pants pocket and produces a tiny pink porcelain elephant."And I want to use this as collateral."
"Ummm, okay," Patti says, accepting the elephant."I'll have to ask the owner about this."
"That's fine," he says. "He'll vouch for me."
Patti walks into the bank owner's office and explains the situation."There's a frog called Kermit Jagger out there who claims to know you and wants to borrow $30,000 to buy a boat.He wants to use this"- she holds up the tiny pink elephant-"as collateral. I mean, what the heck is this thing?"
The owner says: "It's a knick knack, Patti Whack. Give the frog a loan. His old man's a Rolling Stone."