A man is fucking a women from behind with her head inches away from the wall. If you prefer she can wear a hard hat. Right as your about to cum you give'r one final hammer and push her head through the wall. Her head will either go straight through the or find the 2x4. Either way you know where to hang the picture.
When the doctor asked me how she got the concussion, I just wanted to tell him about my new Stud Finder.