U.S. Black Widow Spider, poisonous and dangerous. (also upside-down) << This spider actually seems to be a Red Back spider with the markings on it's back. They're easily confused with Black Widows due to the extremely similar coloring. ~Riley Arachnid
I missed this when I saw The Winter Soldier. Natasha grabs Steve and pulls him away from one stream of bullets and then proceeds to shove Sam out of the way of more bullets with her foot. <<< Yet another demonstration of Black Widow's awesomeness.