I can do a good many things one handed, and it is something I have thought about.. perhaps because I often have one hand unavailable, but most of these are not for polite company :P
I can text and send messages with one hand. Does that count?
You are correct... of course.. but I thought of it first :P In fact it was the only thing I could think of that was ok for polite company.. Is it 'amazing' - well that would depend on the content :P