Since it's the spring time, and many are getting bikes out of storage, do note this recall on any Trek mountain bikes with disc brakes sold between 1999 and now. http://www.trekbikes.com/pdf/recalls...bNotice_CA.pdf
Apparently the quick release can over open, and get stuck in the disc causing serious consequences.
Personally I don't ride Treks (
) but my SO has two that we needed to check out.
Free fix and 'sorry' gift certificate.