Lakefront

My husband & I went for a walk along the lakefront this eve.--it was 90 degrees today, so there were still some people at the beach & a lot of people out with their sailboats on the lake, although it wasn't a whole lot cooler there. The 2 guys here were working really hard to get their sail up in the air, & finally did, but we weren't sure, once it was up, what they were trying to do. We usually see the parasails on the lake, but they were on the sand, & the guy attatched to the sail was working really hard not to go into the water. Do they use them to get pulled along the sand? Or maybe they were just trying to get used to it before they used it over the water...not sure...this was new for us! :)