Is it normal to scream at birds and old people?

Every morning I get up before the sun rises, open my window and scream. I keep screaming until I hear the birds screaming with me, which results in all the birds waking up. My neighbours are angry but they don't know its me, they've called the police once but they couldn't find out who it was. I just really like to scream, it feels good in the morning.

I also scream at elderly people because I'm scared of them. Is this normal?