[Don't look down indeed. Ezio grins and begins the lesson, nice and easy.]

One of the first things to remember, Alastair, is that when you travel above the streets, you keep yourself flatfooted. The front of the foot cannot grip and keep you weighted as the heel does.

[He shows as an example, walking plainly across the top with his feet flat and quick.]

Try walking like that first. Once you get the hang of it, we can try other techniques to not make it so obvious that you are up top.