The cable chop sounds great on paper, but when it comes to the execution it's less of a core exercise and more of an arm blaster. Also, the resistance changes drastically from beginning to end.
With this method, the Swiss ball acts as a cam similar to what you'd find on a machine, giving you the feel of constant, equal tension throughout the ROM and putting that tension right where you need it.
While waiting at the DMV for my moped license renewal form, I decided to kill some time with one of my favorite childhood pastimes. No, not chewing tobacco and throwing rocks at whores. I'm talking about that crazy little word game known as Mad Libs.