Warning: Spoilers ahead.

I don't get what happened in issue #3 of The Flash(New 52), in the part where he's over analyzing the situation and he just freezes, letting the bullet hit him in the head.

In issue #4 he's still alive, explaining that his instincts kicked in, but what does this mean?  

Did he vibrate unconsciously, so the bullet went *through* him? Where did the blood come from then? Why didn't the clones check if he was really dead?

I re-read it a few times and couldn't find how to answer those questions without making something up.

Note: I'm not that familiar with The Flash in general and his history (in other older comics), so perhaps there's a canonical answer I don't know.