Meanest surfing prank?? (Not For the Faint Hearted)

Whats the meanest surfing prank you have pulled or have had pulled on you? The other day my friend decided to do the soap on the wax trick to me, i wasnt to impressed...but i did have a good laugh after.
PLEASE NOTE: THIS POST CONTAINS AN IMAGE NOT FOR THE FAINT HEARTED. IF YOU ARE EASILY OFFENDED / SQUEMISH THEN READ NO FURTHER.. SP.
PLEASE NOTE: THIS POST CONTAINS AN IMAGE NOT FOR THE FAINT HEARTED. IF YOU ARE EASILY OFFENDED / SQUEMISH THEN READ NO FURTHER.. SP.