Haven't had a funny dog video in a bit. Not a whole lot happens here...this boxer is just having a great time playing with a bag of marbles. But this is a PERFECT example of Play Position. Even though the dog looks aggressive, having her butt up in the air and her front down on the ground means she is in a playful mood, not confrontational. Keep that in mind the next you another dog tries to play with yours...if they are in this position, they just wanna have fun!