Oh comon! You'll all jump out of an airplane, but you're afraid of the cold!!! We're in Wisconsin....we jump every week (except maybe when it's below zero)....and we still waterski when there is partial ice on the lake (= water temp 32). We don't wear shirts at the Packer games. Hell, Eric Gagnelius (Prime) even made a naked jump when it was 0 Fehrenhiet on New Year's back around 1995!!!!! Yes....there was considerable shrinkage...from what he reported!!!! LOL