It's a fantasy role-playing game.

DM: You are Scanlan Shorthalt, a gnome bard . You are the member of the famous group of adventurers. Previously, Tiny Vax, thanks to a potion that does that. you managed to go ahead and put in an Immovable Rod within its stomach, which held it up for a moment, before it decided to truly gain the advantage it needed to escape the circumstance, allowed it to tear through its body, as well as an arrow that was shot by Vex, towards her brother, in the hopes of, I don't know, being a symbol of hope?
DM: 18! Okay! You manage to leap behind Bigby's Hand and grab onto the side of it as the hand punches entirely out of the dragon's body, the wound slamming shut behind.
Player: Oh god, I'm outside the dragon?!
DM: You are now outside the dragon.
Player: (screams) Shit!
DM: Holding onto Bigby's Hand.
Player: Is he flying? Does he stay still? What does he do?
DM: He is flying.
Player: He can fly?!
DM: Bigby's Hand!
Player: Not as fast as the dragon.
DM: Bigby's Hand can move up to 60 feet, so no, it's slower than the dragon. Starting to drag a little bit behind as it's moving.
Player: God. Okay! Hand can't do anything else, right?
DM: No, that was its action. That's most of your turn, really, at this point. That was your movement to push through after the bonus attack, so you have your action. I'll give you your action.
Player: You're not going to let me cast another spell, probably.
DM: You have an action, so you could, technically. You look out as you punch through. You look down below you suddenly after you take a moment to look, and you can see part of Vax emerging from the side of the dragon. And then the whole dragon and Vax vanish.
Player: Oh shit! Wait, I see Grog?
DM: You do see Grog, dangling from the chain, slowly pulling his way up towards the back.
