With a thumb lug, try using the side of the thumb at the top corner of the nail. That saved my thumb from a flesh-eating BM705.
With the Leatherman Wave, no suggestion. Whenever I've tried one onehanded, it tried to slice my thumb. Some knives are worse than others, but some onehanded knives aren't onehanded.
Walter
[This message has been edited by wa (edited 02-21-2001).]