No dancing on one foot!

Desiree and I were walking along the beach yesterday morning after shooting a wedding. We walked past these sand bags that they are using to rebuild the beaches and noticed this sign. It should be obvious what it means but it just looked odd. So I think they really don't want people dancing on one foot on top of these berms. (especially since there was a bar right there on the beach... I can see that going wrong in a hurry!!