Psycho Puppy

I swear my puppy is either bipolar, or just plain psycho. Today he suddenly got really crazy. He was rolling around on the ground, then he jumped onto the couch with me (which he can't normally do cause he's little and can't jump that high yet. But he had a running start.) He kept trying to get me, but I wouldn't let him. After a couple "attacks" Samson jumped down. He made a little yelp, and then bam! He was completely calm. My dad was petting him and he didn't even try to bite him like he normally would. It was one of the weirdest moments in my entire life.