Fishing Buddies

Two guys are fishing and just ran out of beer. The first guy reels in his line and sees that he’s snagged an old bottle. As he’s taking it off the hook, he rubs it and a genie pops out. The genie promises to grant them one wish.
“Turn the lake into beer,” says the first guy without much thought. The genie goes “Poof!” and the lake turns into beer, then he disappears.
The guy proudly turns to his friend and says, “Am I brilliant or what?”
The other guy says, “You idiot. Now we’ve got to pee in the boat.”