There are a lot crazier and/or cooler bikes at Burning Man than just those fish bikes. A lot of Burners are very creative bicycle builders. Trikes are popular and I have two friends who have them with GIANT Hoosier sprint-car tires. They actually float. One is also used for Kinetic Sculpture Racing, which is another place where guys do a lot of extremely inventive bike building.
The pole with the lightning bolt on top of this Beast-wheeled trike is a flame cannon!
I think a lot of you would really like what bike stuff is going on in the Burning Man world!