I learned an important lesson the other day. When you have an inexperienced crew helping you rig or unrig, make sure you make it clear to them NOT TO UNDO ANY SHACKLES WITHOUT CHECKING WITH YOU FIRST. Also, it would help to have eyes in the back of your head!
Imagine the scene: you've just taken down the jib on your Hobie 16 and your crew has very helpfully unshackled the jib halhard from the top of the jib and handed it to you. Then, while you're busy securing the jib halyard to the base of the mast, your crew, trying to continue to be helpful, removes the shackle that connects the forestay from the forestay adjuster. You look around to see them helpfully handing you the forestay. NOOOO!
By sheer luck, the falling mast didn't hit anything and no serious damage was done...
Just thought some on this forum might enjoy this little story.