Karai Nalladhu !
All of us wud have said an 'ah' when we first saw the surf excel ad .. A boy and his younger sis are on the way back from school , when the girl falls down in mud and dirties her uniform. Unhappy with that she cries. To please her the boy falls in the puddle and kicks the water !! Finally he says 'sorry bol diya' or sorry solliduchu .
Finally the ad finishes with 'Daag ache hain' or 'Karai Nalladhu'. A wonderful ad !!!
Similar to that is an Ad i think from Hutch , where a dad plays with his year or two old kid and takes his picture wid a camera mobile. The kid takes away the mobile and looks at the foto and throws the mobile off !!!. Just a passing thought