Jump Before The Bullet

''The most well-known sacrificial move in fiction history. And also probably the most hated.''

When someone throws themselves in front of an incoming projectile attack from an enemy to shield somebody else. Most likely, the selfless act will result in a Sacrificial Death, having the protected person mourn the passing of their ally they commonly hold closely in their arms. If the jumper can survive the shot for a few moments (and they likely do), they get their Dying Words out before releasing their last breath. It's expected that the shielded person then either cries, yells the jumper's name, and/or becomes a Rage Beast to destroy the enemy and avenge their protector. If the attacker, likely an antagonist, hits someone they care for due to them Jumping Before The Bullet, they may stop and have a What Have I Done moment and quit fighting.

An alternative to the regular Jump Before The Bullet scene is where someone is standing in the way of an incoming danger (like an out-of-control train or falling boulder), then another person comes along and hits them out of the way so they would be hit instead.