I walked past a nice buck going in one morning, and caught his eyes with the flashlight. I was hunting in a really thick area, and it was really dark, or I wouldn't have been using the light much at all.
I knew he busted me, but he didn't move, except to turn his head to look at me, so I just kept right on past him to the lock on about 50 yards away.
Climbed up, laid the mag light in the seat (still on), climbed back down, and went to a nice clump of junipers between where he lay, and the tree stand.
Bout 10 minutes after good light I spotted him coming out of his bed. He walked right behind me, and then stepped out to take a peek at the tree stand.
10 yard double lung shot. 40 yard recovery.