"Hello, is this the FBI?"
"Yes, what do you want?"
"I'm calling to report my neighbor Mike Smith! He is hiding marijuana inside his firewood."
"Thank you very much for the call, sir."
The next day, several FBI agents descend on Mike's house. They search the shed where the firewood is kept.
Using axes, they bust open every piece of wood, but find no marijuana. They yell in frustration at Mike and leave.
The phone rings at Mike's house.
"Hey, Mike! Did the FBI come?"
"Yeah!"
"Did they chop your firewood?"
"Yep."
"Happy Birthday, Buddy!"