Arm pump is called showmanship..
Surf races/freestyle pose too many problems, including hard to set up close due to tides and waves, hard to get crowd close to action because of changing beachfront.. I had a surf event cancel on conditions and this cost everyone involved..
Just look at our Roar on the River next week and St. Clair Riverfest on Aug 1st -- crowd is on boardwalk, then 20+ feet deep freshwater to ride in-- crowd is close to action and VIP tents 100 feet away, no changing tide, well attended existing event with everything in place... local media covers event, no law issues (at last year Roar on river the coast guard made wakes for us), crowd loves action, and the list goes on..