That is a succinct summary. Blunt force injuries can be much worse then penetrating injuries, since its the shock wave that actually causes the majority of damage

There are three to four stages of explosion damage to a person: Primary (Explosion itself) Secondary (The shock wave) Tertiary (Injuries from being thrown against buildings) and Quaternary (Misc. Injuries, burns abrasions etc)

Roman with the explosive/concussive blast shown from his weapon would likely cause significant trauma and be lethal at point blank range as it would rupture the heart and lungs or transect important arteries

Just a bit of nursing/medical knowledge, and yes the placement its just bellow the chest and about at the right angle of the heart



On another note I really enjoy your comic strips! Keep it up!