That was great! After I watched it the first time, I had my kids come over and made them point to the differences on the screen. The timing was perfect! It scared the number 2 out of them! 
Most cruel father. For penance you must bring them a shrubbery, or you shall be visited by The Knights That Say Icky Icky Icky Icky Kneeeeeeeeeeā¦
I just got back from the hospital from having the battery changed in my cardiac pacemaker after clicking on that link, thank you very muchā¦ 
Actually, when I saw those two pictures, I tried crossing my eyes to see the pictures in 3D (remember those things?) when the ādifferenceā popped out at meā¦