A six year old walks into the kitchen where his mom is cooking and says " Mom, the last few nights I woke up to this thumping noise coming out of your bedroom and when I look to see what it is, youre sitting on top of Dad and bouncing up and down. Why are you doing that?" The startled mother tries to recover quickly and says " Your dad is a little over weight and I'm trying to get him back to normal size, I bounce on him to get all the air out of him." The kid shakes his head and says, " You're wasting your time. When you leave for work, the lady next door comes over and blows him right back up"