Spoilers for Avengers: Endgame follow below.  One of the most devastating moments in Avengers: Endgame comes before the big battle, when Scarlett Johansson’s Black Widow sacrifices herself in an act of pure bravery to acquire the Soul Stone, which in turn gives the Avengers the chance to revive half the universe’s population. It’s a tremendously emotional moment, and one that plays out with serious tension as Black Widow and Hawkeye (Jeremy Renner) essentially fight each other to prevent the other from dying. A decade of character work and terrific performances layers the whole scene with a serious …