There are two possibilities... 1. The person you watched does not know how to use a katana... or 2. You do not understand what you saw. If you chop with a katana, like chopping a tree, you will break the katana.I did see in video they have moves like chopping. I don't use any other moves from katana, just the chopping move. I practice the chop and pull back like reversing the chopping motion. That is definitely the move of katana I watched, not a baseball bet swing.
Getting a pen on a plane is easy. It does not have to be shoved into a sock to use. It can be used in very close quarters (such as on a plane)... it might actually be easier to use on a plane than a cane.OP doesn't like cane, option is very limited getting on the plane. It's not as if you have better option to choose from.