My dad caught me masturbating!?

my dad caught me masturbating, i was just sitting on my bed all naked in stuff,getting in the mood and he just burst in my door without knocking! i have a lock on my door but i forgot to lock it becasue i went out of my room to lower down the television volume and i came back in to continue masturbating and he just came in,and i was like OMG AHHHHHHHHHHHHHHHHHHH!.Holy **** i just feel so embared when he looks at he probably sees a little masturbating boy,geez this is awful,any body have any copeing strategies?