yeah you use those floaties the ones for like 2yr olds to learn to swim floaties.. you put a couple on your bike and bam go to town.. i personally have 4 bike 2 full sus 2 hardtails and 1 bmx dirt jumper.. now i only use my dirt jumper or a hardtail to practise no mind it these are BEATEr bikes i use im not jumping into a lake with my 4000$ Freeride bike aint happening. but man talk about fun who cares if its only you and a few boys your not tryn to impress anyone jumping into water your learn body mechanics and the feeling of flyn spinning and flipping. you think most of these tricks you see today we learned on dirt. ahhh no most of them were learned by jumping into water or a foam padding pool.. when you throw a 360 and you dont land it on dirt for the first time your done but if you under rotate or over rotate on water really no biggie... get a beater make a ramp find a lake and start jumping and practicing
oh yeah did i mention its FUN
AN6