It's a fantasy role-playing game.

DM: You are Percival de Rolo, a human gunslinger . You are the member of the famous group of adventurers. Previously, Taliesin and Marisha start eating popcorn. Scanlan manages to maintain his eyebite spell; he tries to escape the acidic digestive track by casting Thunderwave from the inside of the worm.
DM: I think you can still move around, you just think you have to have concentration towards it, I'll have to--
Player: I'm going to have my concentration on reverting. But in the meantime, I'm going to--
DM: You can use your action to begin to revert your form, yeah.
Player: I have to use my action?
DM: However, nope! Reverting takes a minute, during which time a creature is incapacitated and can't move.
Player: (sputtering)
DM: So yeah. So currently--
