Instant Photo Album - hidden camera joke

Old woman forces bystanders to sit on a park bench next to her and look at an album of family photographs she weirdly carries around in her purse. The prank victims want to be polite, so they nod and listen to this poor old granny. But then, grandma pulls out the most recent photo album, and the prank victims are shocked to see that a picture of them sitting on the park bench with the old lady is in the album, labelled under "Today".