peeing in your jumpsuit is actually good for you.
While orienting as an orthopedic nurse, I learned this tidbit form an expert on pelvic fractures. Basically, having an empty bladder, at the moment of a pelvic fracture, reduced the chance of internal injury because of the bladder's reduced size in its nondistended state. That means less bladder to hit with a chunk of misplaced pelvis. Less bladder space means less displacement of colon, and other assorted anatomical injury risks when the pelvic cavity isn't crowded by the remnants of your last 7 red bulls. Speaking of colons,the famous PJD is not a bad idea either. Don't be full of crap unless you are bragging about your best distance to the ditzy, yet busty waitress at your nearest lakeside Hooter's.
Note: I wish I had the Rowboat's research team working for me. If that were the case, I would have have pictures of someone peeing, empty red bull cans, a jumper, a hooters girl, and a bottle of milk of magnesia to go with my little announcement
So do yourself a favor and pee in your jumpsuit. Just wait until you get into the water.