[QUOTE=gamayun;1705972]I don't understand how these mishaps can happen....QUOTE]
Well, they do.
* Head. If you don't want certain things going into the head that shouldn't, be sure to have appropriate disposal and some zip-locks in obvious sight; guests can be too embarrassed to ask. Put up a visual sign.
* Docking. I always explain that I don't want anyone reaching or jumping; if the piling does not come within easy reach, I will repeat the approach. Basically, I dock as though it were only me. If I want help, I will take each person to their station ahead of time, lay the line out for them with whatever loop is needed, and explain what is needed... and not to strain doing it.
* Out of the way. When docking I give specific instructions regarding places I don't want anyone standing (sight-line or between me and the first line ashore). For example, since I back in every time, everyone aft must be seated.
* Sea sick. Always have meds available, even if you never use them.
And no sunscreen on the dodger
, and no spray bug juice on the boat.