Being unable to respond to the skeleton, he was scared stiff, the skeleton eventually left and the dog chased after something. Then he heard somebody help out to meet at the dinning room which much be in the direction of his voice. 

Barry followed the voice to the dining room and walked in to see quite the gathering. The way some were dressed looked like they were about to go to a convention later on, that would probably explain the skeleton walking around.

Since Barry didn't really know anybody, he couldn't decide whether to go greet them or not, he's never actually talked to anybody except the skeleton.