Originally posted by CadoAngelus
I don't think they're magnatised, it's more a case of, they can grip and so he can climb much like a cat climbs a tree...with it's claws digging into whatever surface they're attached to
In Labyrinth of Evil, it is said they're magnetized when he uses them to fight Mace Windu atop a moving maglev train.
I was just watching the duel between Anakin and Obi-Wan, and at one point they're crossing some thin pipes attacking each other while trying to maintain balance. A well time Force push would have been handy there, I think.
I think pretty much every Force power is typically forgotten when it most makes sense to use them (Obi-Wan using Force speed to catch up with Qui-Gon and Maul), and then they are used when necessary for plot advancement (Maul pushing Obi-Wan into the pit).