User blog comment:Cainelee20156/Is Ghost from MW2 Alive?/@comment-25261281-20150104173229

It's actually normal that gameplay mechanics do not apply to story events. It's also normal that gameplay physics (especially the ones about player health) are rather unrealistic, as if they were realistic, the game would be impossible - try playing a mission in Veteran mode without taking cover, see how easy it is.

It's like saying that Soap being wounded at the end of MW2 is weird because your character can take a sniper shot in the leg and recover full health in seconds.