Raccoon: This is based off a real experience and the fic is rated for mentions of a certain finger and bad potty jokes.
Granny Pinako had left Ed alone for a bit to learn how to control his new arm. She was confident that Winry would call if any help was needed. She could hear all three children talking and Winry was giving Ed orders to follow. All was quiet for a few minutes until she heard Ed's voice.
"It's getting stronger!"
Not really sure if she wanted to go in there, Granny Pinako headed in anyway. What she saw next made her stop and stare for a moment. Ed was still sitting on the bed; Al was in a corner; and Winry was somewhere in between on a chair. Too bad that Ed was facing towards the door with his middle finger raised.
"Edward William Elric! You'll be needing a sight more than a mechanical arm if I ever see you do that again."