Jacob gives a double devil horns hand gesture in response to Link's, then shifts to sit on the floor in front of the window in a kind of yoga position. As the woman walks in, there is a kind of echoing whistle from inside the gas mask as the blank eyes of the mask follow her for a moment. Not a lewd whistle, just one of appreciation. 

He noted the mention that there were only three applicants, so assumed this was it. Once the door closed, he reached up and pulled off the helmet like mask, running a hand through his hair to ruffle it out. The soft echoes of music drifting barely out from inside. "Yeah, most people just call me Bob. Or the Jersey Devil if I'm performing."