Ugh..why didn't I hear it?

Last night at work, my manager was talking to this fairly new brunette named caitlin. She’s been there for about 3 weeks now. She’s a white Italian, with a very nice ass. And she’s always wearing tight pants to show it off. He was talking to her and I was probably about 10 ft away from them and I heard him say" Eww". I went over and said, what could u possiblity have said or done to make someone like Walter say EWW? He said, she just burped 3 or 4 times. Damnit!!! Why couldn’t I have caught them? Well, from this point on, I’m gonna keep my ears open