I'm a bit concerned why a pilot should be asking this.
A high time pilot wouldn't be asking (he would know). Any pilot with common sense wouldn't try to impress folk on the ground whilst carrying passengers, or at all for that matter. Unless you have a display authority, leave this sort of thing alone. It can and has, ended in disaster.
Here's a discussion of just one example:
http://www.pprune.org/forums/private...cambridge.html