Mary isn’t dead.
So I re watched the scene is HLV where Mary shoots Sherlock to see if I could compare the two in any way, and boy did I find something interesting.. Whilst Sherlock is in his mind palace in his last few seconds, Molly speaks to him:
But isn’t what happened to Mary exactly like how it happens in the movies? There was a big spurt of blood and she went flying.
Molly also mentions to Sherlock that he has three seconds of consciousness left before he blacks out.
So if Mary got shot in the same spot as Sherlock (I think), then shouldn’t they both have around the same amount of consciousness left??? So why does Mary get one minute and thirty-four seconds of consciousness??
Simple. She’s faking. She’s not dead, she just wanted to burn the heart out of Sherlock.
In the behind the scenes video of TST it is shown how they make the gunshot wounds look real using ‘blood bags’. More specifically they said, “The special effects team made sure their hits would definitely draw blood.”
Now, how hard do you think it would be for a trained assassin to buy/make one of those?