Water everywhere and not a drop to drink

My cousin has never been shy about poking fun or practical jokes.  We had time for one last photo before heading out from our weekend excursion.  I was following my cousin into town when he stopped his car, ran back to mine, and says, "Let's take a shot that will make Laney(Derek's mother) cringe".  The day before we had stopped here and he wanted to see if he could make it out to the rock in the river without falling through.  His first attempt failed and he ended up with a wet foot.  He did eventually find a solid path out to the rock while there was moving/running water a few yards away.  He decided on this day to do it again, but with my son.  With a little trepidation, I let Derek follow him to the rock and they made sure they followed the foot tracks from the day before knowing this was the "safe" path.  It was only after the successful shot that we realized that Derek's mother had already let me take Derek for the weekend out onto a frozen lake with 40 degree plus temps and really, how much anxiety was this shot of two people standing on a rock going to create.  I'm still glad we did it.  It turned out to be a nice picture.