If you want to create some extra impact when public speaking, don't be afraid to do your presentations via use of odd postures. My friend Ron Culbertson starts his talk while standing on a table. Another friend of mine Barbara Sanfilippo climbs a ladder while on stage. Zig Zigler kneels. I do a signature story while sitting on a chair and I have sprawled myself across a table to make a point. I have seen speakers doing handstands, backflips, riding a bicycle and standing on their head. Of course, I wouldn't do the whole talk standing on my head, but who knows . . . I might look better that way. hahahaha