The craziest one I got was while filling up at a gas station with my TriStar years back. Had a guy ask me if the loading bars were the exhaust pipes for the boat. Have no clue how he could possibly think that but I have witnesses to back up the story.
I get all the same comments but the fishing comments seem to be the most popular. I think it's easier for people to understand the tower as a fishing device rather than something for skiing.
People also seem to think all my boats are new when they see them. They're typically surprised when I tell them my boat's 6 years old. Makes you wonder what they think a six year old boat should look like.