Question

story: One day I was sitting in the balcony with a cup of coffee and suddenly....

Answer 1

hii ahmed 

you can add as suddenly my phone rang.it was not just an ordinary phone call.it changed my whole life.(you can use both negative and positive incident).

or suddenly everything started looking so dark.it was darkness all over.and i lost my eyesight.

 or suddenly i saw a girl/boy walking barefooted.her/his clothes were tattered.he/she was begging to people to give him/her some money.(you can express how you felt that time to enhance it.