Oh, awesome. This is much easier to perform than the airship one.
I always wanted to use magnesis on an object while standing on it and found it to be a dumb limitation that doesn't really make sense, although I understand why they limited it since it would break the game. It just doesn't make sense within the physics of the game, as you can pull metal objects toward an arbitrary point that can be anywhere around you, but suddenly when you stand on said object those laws stop applying. It's like Link weighs a metric ton or something. Glad to see that there's a way around that limitation though.
But it doesn't seem like it's possible to move in other directions than up and maybe down, which is a pity since that makes it a whole lot less useful.