One season I set up in mid-day across a meadow from a timbered ridge where I knew there was a bull moose, or more. I put my partner on the meadow. Near sundown, after 8 hours of me calling every hour or so, he whacked a bull as it came fast-trotting across the meadow toward my position.
He had maybe 5 seconds to make the shot. And a good one it was.
It's a good spot, but I've timed two moose just WALKING across the meadow in 21 seconds.... ya gotta pay attention!
But he bitched about sitting there "8 whole hours"......