I'd like to revise the Vehicular Mastery page into Transportation Mastery. It's a placeholder name for now, but here's my new definition for TM:
"Transportation Mastery is the skill to operate external, physical and controllable apparatus to transport the user to a different location. This can range from using a bike to cross the street to piloting a spaceship that can travel vast amounts of space and even travel between different dimensions. This skill also includes the ability to effectively use a living creature (ranging from horses to magical beasts) and even supernatural objects (flying sentient brooms and cosmic surfboards) to transport the user to a different position. Note that using one's powers to transport themselves, such as levitating through the air or lifting one's self above the ground with a summoned rock, does not count since it does not use anything that would be considered external to the user. Powers like the ones previously mentioned are usually innate, unless the character can use their powers to summon a means of transportation and use their own skill to operate it."
tl;dr this ability includes stuff like being able to ride horses, unorthodox types of vehicles (magic brooms & cosmic surfboards) etc. But I do recommend reading the definition for a full understanding of this ability.
Also, I suggested integrating the likes of Water Walking into a new ability that I called Supernatural Movement. Here's my definition for this power:
"Supernatural Movement is defined as the ability to move along certain surfaces usually through supernatural means, often transcending mundane methods of movement. Characters with this power can walk on surfaces that would normally be impossible to walk on such as quicksand, water, air or energy. The application of this power can be extremely broad in its usage, but in general this ability allows the user to move along (or even through) impossible surfaces without falling or passing through it."
Water Walking falls under this ability as well. Besides the examples of Water Walking, I think a user of this power would include the likes of Monsoon from MGR, who can walk upside down on surfaces through some form of magnetism.