Some Polish, English, and French guys are running away from German soldiers when they come up to a forest and they decide to hide by each climbing a tree.
When the Germans arrive, they go to the first tree where the English guy is, and shout, “We know you’re up there. Come down.” The English guy, thinking fast, says, “Tweet, tweet, tweet.”
The Germans, thinking it’s a bird, move on to the next tree where the French guy is and once again shout, “We know you’re up there. Come down.”
The French guy, thinking fast, says, “Hoot, hoot, hoot.” The Germans, thinking it’s an owl, move on to the next tree where the Polish guy is and once again shout, “We know you’re up there. Come down.”