When someone drive-by'd my friends house and it killed 2 of my friends, and i got shot in the knee.
Blood everywhere, scary as forget with 2 people dead beside you, and a leg covered in blood.
But before that it was probably when i got forgeted up off acid and thought i didn't have a pinky finger. It may sound stupid, but it was scary as hell.
Edit: ^ This was after the drive-by but second on my list.