Hey very neat, I haven't actually seen it done from that side.  If you didn't realize though, right when you shoot off a different first lock to enter the village, you can actually see this lock from that gate across the yard and shoot it from a distance. A quick pot shot with the rocket pistol takes care of it (though you can use anything, rocket pistol just requires less precision).

If you can whip around the corner and hit that shot while running though, your way COULD actually be faster, though probably almost negligible. Cool find regardless.