Originally Posted by
last5oh_302
I agree with welsh. Those are definitely not the best ways to handle it. You want your dog to respect you, and to do good things to please you because they love/want to do things that please you. Having a dog do things for you out of fear only dumbs the dog down.
It's really hard to say what's going on here without seeing what the dog is doing, but he's still a puppy. I highly doubt it's aggression but more of a teenage phase where he's testing the waters. My suggestion would be to stop showing him attention when he does this (with a little "hey", or "ahh") and he should quickly learn that this is unwanted behaviour.
Repeat and if he does it again stop showing him attention again.