I just went running up a hill with a gigantic set of keys in one pocket and an iPhone and harmonica in the other. On the way up the hill I found that I could maintain a rhythm that kept the pockets adaptively and widely flapping back and forth and that the overall effect was one of energy storage. Add stiffer pockets and shaped and weighted exercise gyros with further foam wings extended and you are well on your way to looking rediculous if not eventually human powered flight.-- JesusHChrist, Aug 08 2015 run ! Shark ! Jogging Shark ! run !!-- popbottle, Aug 08 2015 Isn't this what testicles are for?-- MaxwellBuchanan, Aug 08 2015 Disappointed, I thought this was a SCUBA or snorkelling idea.-- wjt, Aug 08 2015 And I freediving.-- normzone, Aug 08 2015 [MB] If one is a physical anthropologist in the field collecting samples, then yes I suppose so.-- pocmloc, Aug 09 2015 Silly, impractical. Ridiculous even. What's not to like? [+]-- Voice, Aug 09 2015 [normalzone] I suppose 'underwater diving' groups the pursuit nicely.-- wjt, Aug 09 2015 Yes, and Texan and Californian are the same thing also.-- normzone, Aug 09 2015 random, halfbakery