Jet skis are a symbol of luxury. They're the classic investment of someone who's done well for themselves, and we associate them with the rich. We don't always associate rich people with good deeds or consideration for others - we tend to believe they're selfish, or aloof. Here's someone who's going to change your mind.
This is a resident of Little Ferry, New Jersey - a place that suffered just about as badly as anywhere else when Hurricane Katrina struck. When flood waters rose up, people were trapped in their homes and lost everything they owned. Given that he owned jet ski, it would have been the easiest thing in the world for this guy to saddle up and ride away to somewhere dryer and safer, but that's not what he's made of. Instead, he turned the jet ski into a water taxi service to get neighbors and members of the community from their homes to safety.