Perhaps it's a case of, "Things are really going to rat shit, I might be pushed so I might as well jump and get some ackers in the process". Some people like to feel they have some say in their own destiny, you plank. It's a human trait, certainly it's a matelot's trait, to show you don't give a shit, especially if you do. Of course, only adults would know that.
Perhaps? I would bet that that is exactly the motivation behind the volunteers and why mine were so very happy - '"Cheers Easy" would sum it up nicely.
What adults really know is that there is no need to state the obvious every time. However, in order to aid the cerebally challenged I shall be more fulsome in future. Thank you for your assistance.