"Tim J." wrote
I'm just yankin' Frank's chain, Ernie. I witnessed the birth of that fly
at Penns 2002. Tom Littleton told Frank to put LOTS of weight on a stone
fly to get it down quickly in the fast, muddy water of The Penns. Frank
being, well, Frank, put at least three layered wraps of lead down the
whole body of the fly. We've been joking ever since that the fly would
probably knock the trout unconscious rather than hook 'em.
--
TL,
Tim

Well it might break you rod or skull if you didn't cast carefully. If you
hooked a trout, it's belly might get a little skinned up from dragging it
in.
Ernie