Critique my squat

[PYRO]

The bucket is 10.5" high, the 25lbs plate is 1" (i think). As you see, i am going past parallel, but dunno how much ?? anyone?
Also, i get a sharp pain in the leg joint. I included a pic with a circle to show the location. Is it my form that's causing this? or is beginner's pain until i get used to it...It only happens on my right leg, (rightsided) and doesnt linger throught out day.

http://i4.photobucket.com/albums/y143/pyrotalk/skeleton2.jpg

http://rapidshare.de/files/1808110/MVI_0344.AVI.html

http://i4.photobucket.com/albums/y143/pyrotalk/IMG_0346.jpg

In summary, i love box squats. I am coming down very slow because i am afraid of going too fast just to reach the box. I had one time that i got stuck on the bottom and drop the bar. There is quite a distance like 5" btw the bar (on back) and rack pins. Oh, forgot..My feet stance is symmetric. It looks like one foot is forward than the other because the vid was shot at an angle. I do try my best to keep symmetry even though i tend to look down to make sure..

[Future Marine]

Sounds like your having hip flexor pains. I have them to right now and I hate it, and I have had it for around 2 months. I went to the doctor and he said that its a swollen muscle. I have also read that it is caused by overusing your hip flexor and not warming up properly.

[monotone]

i also had pain in my hip flexor pain, i took a week off and did a proper warm up and stretch prior to exercise when i started back and it went away with rest

[Eric_Yager]

Stand with your shin next to the box and measure how far from your knee it is and that'll tell you how far past parallel you go.

[debussy]

PYRO, dont worry about it. I got this when I first started squatting with a wide stance and squatting deep. This is most likely a problem with flexibility. You will get used to it and it won't be a problem anymore. A proper warmup and a little stretching afterwards will probably help too.