Velocity is more important than mass in determining how much damage is done.

You hit the mark. I fell so fast
I felt the pain before I heard
the long shot in the dark.

Most penetrating injuries are chest wounds.

                                          It passed
right through my eyes and brain and heart.

Penetrating chest trauma can injure vital organs such as the heart and lungs
and can interfere with breathing and circulation.

Last night I dreamed about your lips
and surfaced gasping. I can feel
the blood rush to my fingertips
like memories.

When the heart is punctured, it may bleed.

                           And it may heal —