Funny you mention that, I have looked at many many and can easily see with the trajectory how the brain was missed.
The bullet basically just crashed through the sinus cavity.
He probably felt like he was hit in the face with a baseball bat.
A larger caliber gun would have probably blown his face off.
But, I do not see this wound as terribly serious [as we were previously thinking] as in life threatening, and I can easily see no loss of consciousness. But, his ability to think about things, [like a crazy woman attacking him with a knife], would have been greatly impaired. Although he was thinking clearly enough to get to the sink to examine the wound in the mirror, apparently.
Geez...
IMO