AutoMotto posts the "Parking Barrier With Swing." Here is a bit of what it does -
"While the kids can play and have fun on the swing, the barrier also ensures that some ill-disciplined neighbor doesn’t take up the space to park their cars. When you are back from your work, the swing hides underneath the ground surface to park your car. . . ."
Something tells us this is just a bad, very bad, idea.