I'm usually a mellow, go-with-the-flow person, except when...

I'm usually a mellow, go-with-the-flow person, except when someone tells me I should do something. Then I get stubborn. If they don't back off, I get this horrible rage and want to kill them. When I was four and my mom would send me to my room, I'd get so mad I'd go outside and bang my head on the sidewalk.