▁accident ▁at ▁Mission ▁Bay ▁which ▁resulted ▁in ▁a ▁San ▁Diego ▁County ▁j ury ▁ver dict ▁aff ir med ▁in ▁full ▁on ▁appeal ▁in ▁ 2 0 1 4 . ▁ ▁While ▁also ▁rare , ▁sp inal ▁inj uries ▁can ▁occur ▁while ▁sur f ▁jump ing ▁and , ▁potentially , ▁w ake ▁jump ing . ▁The ▁P W C ▁manufact ur ers ▁owner ' s ▁manual s ▁all ▁include ▁warnings ▁regarding ▁jump ing ▁at ▁excess ive ▁height s , ▁or ▁operating ▁a ▁P W C ▁if ▁there ▁is ▁a ▁prior ▁history ▁of ▁back ▁injury . ▁The ▁current ▁on - product ▁labels ▁say ▁" J ump ing ▁w akes ▁or ▁waves ▁can ▁increase ▁the ▁risk ▁of ▁sp inal / back bone ▁inj uries ▁( par al ysis ) ". ▁The ▁current ▁K aw as aki ▁owner ' s ▁manual ▁provides : ▁" S low ▁down ▁before ▁crossing ▁waves . ▁Do ▁not ▁ride ▁if ▁you ▁have ▁a ▁back ▁condition . ▁High ▁speed ▁operation ▁in ▁cho ppy ▁or ▁rough ▁water ▁may ▁cause ▁back ▁inj uries ." ▁ ▁Another ▁rare , ▁but ▁unique ▁injury ▁risk ▁with ▁jet bo ats , ▁is ▁being ▁su ck ed ▁into ▁the ▁int ake ▁side ▁of ▁the ▁p ump ▁jet . ▁Current ▁P W C ▁products ▁contain ▁on - product ▁warnings ▁that ▁state : ▁" Ke ep ▁away ▁from ▁In take ▁Gr ate ▁while ▁the ▁engine ▁is ▁on . ▁Items ▁such ▁as ▁long ▁hair , ▁loose ▁cl othing , ▁or ▁P FD ▁stra ps ▁can ▁become ▁ent ang led ▁in ▁moving ▁parts ▁and