A "Last Man Standing" mechanic, which gives Max a reprieve from death for a small period if he has one painkiller on him. If the player is able to kill the enemy that delivered the wounding shot with bullets he'll recover enough energy to soldier on.
Max Payne 3 - System Requirements
Video: ATI Radeon HD 3400
CPU:AMD Athlon 64 X2 5000+ (2.6 GHz)
Ram: 2048 MB