Voici de très bons exercices:
http://www.google.fr/imgres?imgurl=http://www.humanflag.org/wp-content/uploads/2012/09/human-flag.jpg&imgrefurl=http://www.humanflag.org/&h=210&w=293&sz=20&tbnid=YT0G36NLkItVIM:&tbnh=90&tbnw=126&zoom=1&usg=__JM6Xeq2Y4OPfxfAORPVnXzGqGCU=&docid=rNvdwfJh5dFnqM&sa=X&ei=II5qUsy0Ooa6hAev2IGYBA&sqi=2&ved=0CDsQ9QEwAw&dur=0
http://www.google.fr/imgres?sa=X&biw=1366&bih=651&tbm=isch&tbnid=4p4DLD-xwSEeIM:&imgrefurl=http://tomakarat1.skyrock.com/2804190791-Hirondelle-aux-anneaux-avion.html&docid=s960GP7SwaI5tM&imgurl=http://b7.img.v4.skyrock.net/4391/70174391/pics/2804190791_small_1.jpg&w=400&h=266&ei=QY5qUrosgd-0BvnvgbAJ&zoom=1&iact=rc&dur=402&page=1&tbnh=122&tbnw=205&start=0&ndsp=26&ved=1t:429,r:23,s:0,i:157&tx=158&ty=60
