It'd have to be both the overesti-baiter and tree magnet for me but could also have done with a "ripping your landing net out of undergrowth and swearing" option. :doh:
I used to carp fish at a lake in Sutton Park and every day of the year a dozen or so pensioners aged 65-85 used to jump in and swim (they probably still do), even breaking the ice to get in! Mad as hatters, but swore by the health benefits.
It was quite common to wake up early morning, look out of the bivvy, and see half a dozen old ladies quietly paddling through your swim.