Here's some safety tips that could be very useful on a jet ski/waverunner.
If you ever find yourself running into bigger waves or rougher seas, these are some great tips to keep control of your boat. Also, the PFD (personal floating device) he's wearing in this video is a great safety item to have on you, as it could very well save your life. Never take it for granted that you will always be safe while out on the water, because something could happen pretty fast and unexpectedly. Before you go out, especially if you're a beginner, watch this video and others to make sure you do things the right way so you can stay safe.