The strength of dental floss varies greatly. I've got some waxed grocery-store-brand (Food Lion IIRC) stuff that is very strong. After removing it from its plastic case it is a much smaller item.
BTW waxed line is great for whipping the ends of ropes. Whipping is a good skill in its own right. Here's a nice animated graphic on how to do it:
http://www.goddardkansas.us/troop776/whipping.htmlSteve
_________________________
"After I had solaced my mind with the comfortable part of my condition, I
began to look round me, to see what kind of place I was in, and what was
next to be done"