Another question, this one may be dumb, but I had a professor once that said the only dumb question was one that wasn't asked or one you already knew the answer too. I just started tying flies and I have noticed that when I leave the bobbin hanging it gets to spinning round and round. Will this hurt anything or does it matter? I realize as my username implies that the flies I tie won't be around long anyway, but I don't want to get into a bad habbit if I can help it.

I know that grass string like farmers bale hay with can be tied up in a tree or what ever, take the loose end and tie it to a bucket or some weight and it will begin to spin around immediately. Shortly there after, depending on the quality of the twine, it will come apart and the weight will fall to the ground. I know my question was about thread, not grass twine but I don't know how the thread is put together, and I can't see it well enough to tell.

thanks in advance,
Jason