This is very similar to one of my favorites:
A Hasidic Jew walks into a bar with a frog on his shoulder.
The bartender says, “Hey where’d you get that thing?”
The frog says, “Brooklyn. They’re everywhere.”
It’s not easy coming up with the best anything ever, but a joke I first heard ten or fifteen years ago still wins today. Here it is, the best joke I know:
Guy walks into the doctor’s office with a duck growing out of his head.
“My god,” says the doctor, “how did this happen?”
“Well,” the duck says, “it all started with this thing on my foot.”