Julio the soldier
Julio is a newly incorporated soldier, but his sergeant noticed he isn't in good physical shape for the job, so he is forced to participate in the doctor's Super Soldier serum experiment. His already weak heart can’t resist the treatment and he flatlines, just like the other subjects.
It took many rounds of CPR and several doses of adrenaline to bring him back successfully. Now he can go back to his duties.
Watch the preview here: https://youtu.be/2RGQhzlXxgU