You put your fingers and an ear on a stool in the sun so you can get your photograph taken. This is a glamour photo, so you have to be in one of these weird, cheesy poses for it to come out jusssst right.
As you're getting the photograph taken, the photographer suddenly gets angry at you. "You sat (さつ) down!" he screams. "I sat down?" you ask. "Yes! And now the photo is ruined!"