Yesterday, I was talking to my colleague sitting in a plastic chair. When he got up to go out, his fingers touched my shoulder and I felt needle like pricking. He also felt sudden shock and could hear some sound. We thought this may be due to static charge on the body as he was sitting on a plastic chair and during movement, and may be because of synthetic dress, some charge accumulated on the body discharged in the form of sparkling sound.
Few times, I feel pain at the edges of the fingers when I touch clothes in the spinner of the washing machine. Reason may be same, due to charge accumulated during the spinning action.