Male vampire bat goes in search of blood to drink and returns in 2 minutes with lots of blood in its mouth. Female Bat: “How did you manage to get so much blood in 2 minutes?” Male Bat: “Do you see the black wall over there?” Female Bat: “Yeah.” Male Bat: “Well, I didn’t!” 178. Cow 1: “Did you see the news? The mad cow disease is affecting many cows making them to go mad.” Cow 2: “Yeah, I saw it on TV. Thankfully, it won’t affect us donkeys!”