The last time I was really wound up, and I won't go into what caused it, I pulled the handbrake on the car & it erm, came off in my hand.
Cable & mountings snapped.
The thing that calmed me down, and I'm not ashamed to admit made me cry, was whilst still seething sat on the sofa, my 3 yr old randomly came over to me & gave me a cuddle with "love you daddy." He's usually the type to beat me up than give big hugs, so I was very touched.