The best way to give your mother a heartattack

I, once again as the scheming little broad I am, decided to surprise someone. This time the victim was my mother. I took the ferry over to Finland where my sister and her husband came to pick me up. They have the keys to my parents building, so we let ourselves in. Luckily we decided to ring the doorbell instead of barging in...She opened the door still very sleepy and looked straight in my eyes and said "yes?" Like I was the janitor or something. BUT THEN it hit her and she almost fell over. Literally. It was fantastic. Her eyeballs jumped out off her face and made a loop before they got sucked back in again. Sneaky, sneaky!