Totally normal. infact you should be worried if he didn't do those things. You can yell ouch when he bites and disengage. Don't try and discipline or be the dominant. He just needs to learn that his bite hurts, then you can proceed with "no bite". Jumping, use the palm of your hand and push away with "off" command. A gentle knee to the stomach to hush him back can work too. Do this with helpers too so they understand that means all people, not just you.