Squat Form Critique

[PxWang]

Hi Mark,

I have been reading and re-reading your book for quite some time now... I also have been reading alot of your comments on the other videos. I finally videotaped my squat so if you dont mind would you comment on them.

Squating 235
http://www.youtube.com/watch?v=rjiwn9p59vY

Squatting 225
http://www.youtube.com/watch?v=O8H2Nbb2qOc

I think my knees are sliding too far forward on this one...

[Mark Rippetoe]

I like the second set better. Your shins were too vertical on the first set, and you have to use your quads to squat. I'll bet the second set felt stronger to you.