This is not sufficient evidence of them flying, they could very well be jumping and you caught them above the water. For things like this, we really need video evidence to prove them flying. Also, for future reports, please use the format that we require found at this link: http://www.mineverse.com/threads/read-forum-report-template-forum-report-information.33868/
Thank you for the report. Unfortunately the evidence provided is insufficient. Should you gain more evidence in the future, do not hesitate to report this player(s) again. Kind regards, The Staff