This might sound like a really stupid question...I have been wondering for a while what people mean by "truss spot" and "truss spot operator." does that mean someone is sitting on the truss witha mounted followspot? or are those intels that are supposed to follow a person? I did some google searching and the only info I found was about the truss spot op who fell off of a chain ladder at a bowie concert. Can someone please tell me about truss spots adn their operators, and what'd be really nice is a picture. thanks!