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: Okay, well, before that happens you do take four points of acid damage from the stomach before you take the form, because that would be the top of the round. So, at which point you turn into a small poisonous snake, now floating amongst the acids, and find your way along the surface. And you're heading towards the wound?
Player: I'm going into the wound.
DM: Okay, all right--
Player: With a swim speed of 30!
DM: Right, you do. Let me check.
Player: But I don't know if it's swimming, it's more squeezing.
DM: Through the acid, it's swimming. Once you get to the actual wound, this is more squeezing. And that's going to be more of a strength-based element. So that being the case here, a poisonous snake, I'm going to need you to go ahead and roll a strength check to push against the wound.
