Lesser Focused Agility Potion

You might be mistaken in thinking that an agility potion will make you an overnight athlete. The potion is still working with the body you have: there are no dramatic physiological changes. For physiological changes, you might want a trip to Dr Fenkenstrain.

An elder gentleman with dodgy hips will shuffle faster - and will likely experience incredible pain as they do so - but won't be able to perform backflips.