Oh yep I've got one of those.
My DD was like that little girl - she'd sit in the pram for hours without a peep, you could put her down anywhere and she'd actually stay there.....
I wasn't prepared for an active little boy. Yesterday I put him in the middle of the bed, turned my back for TWO seconds and turned around to see him launching head first off the bed onto the floor! He was fine thank god but I don't know if I can keep up with a little boy