Ive waggled the wings a few times and to be honest I couldn`t give a hoot what it looks like from the ground and spend the whole waggle looking at the dials.
I have to agree with English, if a pilot cant do this safely then questions should be asked.
If you are in doubt get an instructor to go up with you and show you how best to do it safely.
My own advice would be dont spend any time looking at your intended viewers and keep your wits about you in the cockpit, get it over with quickly and concentrate on flying the aircraft.
I have noticed that when taking photos (for example) some of my friends inadvertantly let the airspeed bleed off......
NOT A GOOD IDEA. and probably more likely in your example.