The grass was tall by the water's edge, so Jesse has to carefully wallow through the muddy shore to properly see the other side of the pond. He scans for him hoping he can see Bruce - and he sees a man there, looking a little bit like Bruce. Jesse jumped up and down, splattering more mud on his jeans, waving his arms. Jesse had the foresight to not to yell out. This was a hunt, and he and Bruce are supposed to be prey in this.