How do they REALLY catch a bullet with their teeth?

[Gunslinger]

@Musicat

I saw a Penn & Teller variation on this variation once (sorry, no link), and P & T, who always like to one-up their colleagues and fool armchair amateur magicians like me, marked a bullet but made sure everyone saw that there was no contact between performers so the bullet could be passed.?

Penn: “Like all magicians, we have magic wands. Colt Python .357 Magnum ‘magic wands.’”
Teller: “…”

I’m gonna go with the theory of the “random audience member” being in cahoots with them and marking the bullets to match the pre-marked ones they already had. (they both shot at each other, for those who haven’t seen it)