The mighty cacti

When you meet the saguaro cacti face to face, they can be rather unsettling. Most are taller than your house and many have gray patches of dead flesh, gouged by birds who use them as home over their centuries-long lifespan. Worst of all is the random formations of their arms. Some come across as alien space invaders, while others look like mustachioed men caught in a hold 'em up. Whatever their physique, they can weigh many tons, and one would kill you in an instant if he decided to fall on you.