When you describe a kind of movement not detailed elsewhere in the rules, the GM tells you whether it is possible and what kind of roll you need to make, if any, to determine success or failure.
nameImprovise movement
typemovement
displayitem
sectionmovement
iconActionImproviseMovement
subtitleAny movement or stunt
href/gameplay/movement/improvise-movement
descriptionPerform any movement or stunt you can imagine