The 5e D&D spell Freedom of Movement says:
The target can also spend 5 feet of movement to automatically escape from nonmagical restraints, such as manacles or a creature that has it grappled.
But, the grappled condition sets a grappled creature's speed to 0. therefore, by the rules as written, doesn't she or he have no movement to spend?
Is there some rule where you can "spend" from your normal base speed even when it is temporarily reduced? Or is this just one of those cases where we all shrug and go "eh, it is obvious what was meant"?