I agree with others: ER or doctor and a contact with a police and/or social services. Even if your father is fine for 99% of time, that 1% is still too much, especially if it wasn't the only time something like that happened.
It sounds as though this kind of behavior is the norm from his father, not just a 1% of the time thing. His father simply injured him even worse than usual this time. Medical professionals and law enforcement definitely should both be involved.
My dad insults and punches me whenever he sees me so I don't like spending time outside my room. I can cook carbs quickly because of oatmeal and pressure cookers but meat requires using a pan in the kitchen for about 30min.
I keep a fridge in my room and am planning to buy a small pressure cooker and maybe an oven so I won't have to leave my room except to wash my dishes.
Using the toaster oven, I can simply place the meat on a plate, add some salt/spices and wait for a while. Not using a pan also means that I can spend less time outside washing stuff. If I use this (small) oven will I be able to do most of my cooking in my own room?