Here are some videos on static apnea. Pls take care about this:
http://www.youtube.com/watch?v=eWC2_0NbVKA&feature=related
http://www.youtube.com/watch?v=iVqgBAlNHNs&feature=related
http://www.youtube.com/watch?v=L4cy1Y6NUQE
many thanks emic these are some things to keep in mind about safety. I was one of those who took for granted safety until i did a first aid course.
another good one
http://www.youtube.com/watch?v=PFqrHwzDN0E&feature=related
important steps for recovering a spearfisher
http://www.youtube.com/watch?v=RwaQCFVvnLY&feature=related
most importantly you have to know your limits and do not push them on your own !!!