The Physics of Pushing Someone into a Pond

As some of you may know, I work at a restaurant that is known quite well with little kids for its "huge" bridge and koi pond. However, there are some nights when these little kids become too rambunctious for my taste, and many times I have contemplated the consequences if I were to push somebody into the pond. From a physics perspective, it really doesn't take much force to launch a small child over the brick ledge. An adult would require a little more force, but everyone needs a strength test every once and a while. I don't know if you guys can tell, but I really enjoy my job...Not.