widespread archaeological evidence suggests that many North Americans of this era acknowledged the existence of three genders: "men", "women", and "employees only"
Oh my God the magic trick only works because Aziraphale and Crowley trust each other 100%
Aziraphale gets shown the trick in the little handbook and told that he needs 'nerves of steel' and a 'hand that's as steady as the rocks of gibraltar'. And finally a '100% reliable marksman. Someone you can really trust' (Aziraphale's eyes flick to his left, where Crowley stands). 'Otherwise it's lethal.'
And he says what he thinks right then and there. He's 'got the perfect man for the job.' (Crowley is like ??? and then does a double take at Aziraphale when he realises that he means him, which in turn makes Aziraphale unsure) 'at least, I think I have.'
Then, at the theatre, Crowley is being so honest when Aziraphale asks who has any experience with firearms and Doesn't raise his hand, but Aziraphale thinks Crowley is just being difficult, calls him on stage, and when they realise their miracles aren't working, Crowley takes a 5 second look at the manual (of course he has the manual. He's being so indulgent of Aziraphale. He basically bought the thing For Aziraphale).
He doesn't have the steadiest of aims, not to mention that he has never fired any type of gun ever before. But the trick still works. Aziraphale and Crowley have the tendency to influence reality merely by believing in something. And I'm completely convinced that the magic trick only succeeded because their trust in each other influenced reality in such a way that their magic trick wasn't lethal.
Crowley's trust is only addressed later. 'I knew you'd come through for me. You always do' to which Crowley responds 'Well, you said trust me' and he Did.