wanted criminal

I know nothing about guns, so I looked up derringer bullets and this is what most of them look like

But, after researching some more they can be shaped like this

(just try and tell me those first ones aren't Aziraphale and Crowley coded)

Interesting.

So I did some more research and:

Derringers can shoot balls. the smallest size I found was 4.3 mm, which looks about the same size as the bullet in Aziraphale's mouth. There's no way to be sure, but at least we know they can get that small.

Derringers have two barrels, so they can only hold/shoot 2 bullets but they're fired separately. This seems like it might be important for season 3

There's something called a "snake eyes" derringer. Instead of having the two barrels sit vertically, they're horizontal. I don't know how relevant that is, but it's interesting. And felt like maybe a Clue.

Next, I watched the scene like 15 times, several of those at x0.25 speed. You can Very clearly see the bullet if you're looking

This also drastically changed the way I see their expressions. I know a lot of people have done breakdowns of the final 15, but here's what I think based on the bullet.

(I’ll use the .25 speed video because its the easiest to see. I also couldn’t record with sound, sorry about that)

0:01 They break apart

0:03 - 0:08 Aziraphale looks like he’s moving his tongue to keep the bullet under it

0:10 - 0:20 to me, Crowley’s expression here reads very “please understand what I just did” here

0:20 - 0:35 Aziraphale looks very confused, like he’s processing, and also moving his tongue around like maybe there’s something in his mouth

0:36 - 0:40 Looks like he’s having a Realization (that there's a bullet in his mouth. remembering 1941?)

0:40 He shows the bullet 

0:43 - 0:49 His expression changes drastically. He gives Crowley the tiniest second of an “i trust you” expression. It looks like his face softens a bit, and we get a hint of that Michael Sheen sparkle

0:49 Aziraphale says I forgive you, and he raises his eyebrows A Lot. he looks very similar to the way he does when he’s lying. The “I forgive you” could be fake/code so that no one catches on to their plan. 

Here is Aziraphale lying about the half miracle, and about who Crowley is in the job episode.

0:54 Aziraphale looks very desperate, another “please understand” look

1:05 We switch to Crowley. If you look closely (I had to watch it twice, looking at each separately) you’ll see his left eyebrow raise slightly, and his mouth changes. These are very small changes, and without eyes it’s hard to read him. However, I think here he returns the “i trust you, let’s do this” expression but even more subtle. (best seen in the 0.5 version, around 0:32 seconds)

(^ x0.5 Speed Version)

The more I look at it, the more I think their expressions were purposefully loaded with double meanings. We (or at least I) were all so caught up in the despair of the final 15 that another way to read it didn't even seem like a possibility

We also see Aziraphale touch his mouth after the kiss (oh Michael Acting Choices Sheen), and here he could be removing the bullet.

To me it doesn’t look like this though, I think he really is reacting to the kiss and maybe feeling the bullet through his lips. I think he removes the bullet when the Metatron comes in to the bookshop and Aziraphale turns around.

Here you can see his hand goes up to his mouth, and then comes down and his hands are in fists. Holding a tiny bullet? 

Do I have any idea as to why there's a bullet? nope. but it's definitely there

I think this is everything I've found so far! Hopefully this is understandable, I really think we found a big thing! I would love to hear other people’s ideas on this too