I have had MASSIVE amounts of fun with Trespass. I learned it a while back in PDF form, and picked it up quite easily, so I'm sure the 1-on-1 is makes it even easier.
Think about the demo you saw for it. How impossible it seemed. Now think about having the knowledge to do that.
I have fried more magicians with this than any other move. It is an awesome utility. Albeit, not one to use in every routine every day all the time...but the right time, with the right angles, it's killer.