In a fantasy sequence, the main character envisions killing the heroine of the movie. In real life, he fixes her wounds, pulls a hunk of shrapnel from her leg, and stitches her leg up. Blood is shown.
There's a huge explosion at the climax.
a bad guy shoots and kills a guy in the head not shown
The main character is a trained killer, and he shoots and kills several men over the course of the film. Bad guys shoot back at him and blow up a car.