Had a situation similar to that some 20 years ago. Had a bead between some trees where he was going and never popped through (about 10-15ft in front of his direction of travel). Herd a shot up over a ridge after waiting about 30-45 sec. Must have been spooked at the last second and high tailed it up over the ridge where I found him latter being gutted by another hunter. Just wasn't my day I guess.