(index GIF)
http://www.mensavvy.com/wp-content/uploads/2014/09/kayak.gif
(Freshwater boof)
http://jacksonkayak.com/wp-content/uploads/2011/02/IMGP1966.jpg
(saltwater rock)
http://2.bp.blogspot.com/-TB1KfOQMgbk/U61_8TbMnMI/AAAAAAAABo8/Q-5Sh9iCHe4/s1600/10048476913_816e20fcb4_o.jpg
(wave physics)
http://hyperphysics.phy-astr.gsu.edu/hbase/waves/watwav2.html
(hole info)
http://www.canoekayak.com/start-paddling/whitewater-holes/
(hydraulic jump info) http://krcproject.groups.et.byu.net/
(huge Ottawa wave)
http://www.canoekayak.com/photos/behind-lens-jasper-gibson-molly-wave-pure-ecstasy/
(boof flip)
http://www.lovethesepics.com/wp-content/uploads/2012/03/Kayaking-Chilliwack-River-whitewater-flip.jpg
(BOOFCITY)
http://4.bp.blogspot.com/-6AgR24rRuGg/Tc6Mpn31f6I/AAAAAAAAAMo/eTSJedlQcZo/s1600/top10.JPG
(nat geo fall)
http://wallpapers.windowsace.com/pics/k/a/kayak-waterfall-going-down-wallpaper-1600x1200-14348-t-.-ibackgroundz.com.jpg
(rescue swimmer)
http://www.montanariverguides.com/images/Uploads/Rescue%20Swim%20Entry.jpg
(foot entrapment)
http://swiftwaterrescue.com/wp-content/uploads/2013/01/IMG_4163.jpg
Bloomfield, Louis. How Everything Works: Making Physics out of the
Ordinary. Hoboken:
Wiley, 2007. Print.