I would just like to add that I have had this also. It's weird that when people mention that buzzing thing, alot of times they seem to mention it being behind their knees, because this is where I've had it mostly. I haven't had that in a while, though. It really stayed around for quite a while, but now it's gone. I get the internal shaking thing alot, tho. It's really hard to describe, but lately I find that I have it in my legs, and can sort of feel it as I'm walking, like a shakiness in my upper legs, especially after I've walked a bit. Today I went to the track and walked about a mile with my daughter, and I had the shaky feeling for a while after that. Also, one thing that drives me crazy is this shaky feeling that I get in the back of my neck, going down my back, and I really feel that when I'm laying in bed on my side watching tv. It's funny, tho, when I think way back when I was in my 20's, I remember always getting shaky muscles when I would exercise. Like, when I would go and play tennis, I would come home and my arm would shake pretty badly if I put it in a certain position. I still get that to some degree. I think it must be all part of this fun BFS ride~Val