Some years ago, I was waaay TF back in the top of a drainage and I found a bull; I know this because he jumped up and bugled when my boot caught on a dry branch crossing over a fallen tree. It snapped, I hear a crash then a bugle... JUST out of sight, of course, maybe 50-75 yards away... I froze and hoped for a shot as it moved up the hill. Never came... I've often wondered what would've happened if I'd tooted my cow call and just charged towards him. It's non-intuitive, but my buddy Jerry swears it can work.
Elk hunting is a great way to build up one's "Tales of Woe" collection. Lots of if only's and shoulda coulda woulda's.