Penis
Domestic cats have barbed penises, with about 120–150 one millimeter long backwards-pointing spines. Upon withdrawal of the penis, the spines rake the walls of the female's vagina, which is a trigger for ovulation. Lions also have barbed penises. Male felids urinate backwards by curving the tip of the glans penis backward. When male cheetahs urine-mark their territories, they stand one meter away from a tree or rock surface with the tail raised, pointing the penis either horizontally backward or 60° upward.
King-Size Canary
The mouse in the house takes a few sips of plant food, instantly ballooning to gigantic size. The dog chases the cat to the city, only for the now gargantuan mouse to show up and scare the bulldog away with a simple "Boo!". The mouse who is as tall as a 20 story building and just as fat, reminds the cat that he told him he would save his life. The cat thanks him as the mouse hands him the bottle back and waddles off. The cat, rubs his enormous belly realizing he still is hungry, sees the huge mouse stomping off and gets another idea. He suddenly drinks more of the formula and grows even bigger and fatter than the mouse. The cat who is by now 100 stories tall, chases the giant but smaller mouse through the city and across the country, passing the Grand Canyon, Hoover Dam and the mountains.