I think my Clutch is causing noises?

Well sometimes my car makes a weird whistleing ,screeching noise when i sit at idle with the clutch pressed. When i let off the clutch it goes away. And it happens randomly, but the times it is happening i also feel a weird crunch/obstruction in the clutch pedal feel. Its a FMS king Cobra Clutch, thanx....btw my mechanic doesn't think its a throwout bearing...its pretty loud too im gonna see if i can get a video of the noise
 
Ahh don't they all do it? I got like 3 or 4 different sounds coming from my transmission. Clutch Chatter, TOB squeak and chirp, synchros grinding, and what sounds like the cable fraying when I let off the clutch but I think it's something on the fork. I say jsut drive it until you can't no more, thats what i'm doing, lol.
 
well i took it to 3 of my friends who are all mechanics and none of them think it sounds like a throw out bearing....i guess im going to try and capture it on video so you guys can listen...maybe its a mustang thang... also what happens when Throw out Bearing goes bad?