"Please correct me, Lou, but I'd say that even the most experienced pilot will get lets call it nervous when he gets forced to choose a landing spot within some seconds and then has to perform a real water landing, not a simulated one."

I'm sure Lou will weigh in, but from my few (thank god) limited times I have had to make decisions about 'unscheduled' off airport landings, there aint no time to get nervous, thats comes after the fact. It's not nervous after either, it's either "WHEW, we made it" or OH SH**, no in between :-)

Your training kicks in and you are far too busy at the time to have any emotion's other than 'where am I going to put it and whats the best way to get it there.