I just got this photo from Cuba taken by Matt Hansen. I know exactly what happened here and I think this picture pretty much sums it up.
We were pushing through the back country looking for bones and we had just emerged into a little lagoon. Off to the left flashed an impossibly large bonefish tail. I made the cast right on its nose and it ate almost immediately. It went streaking across the lagoon, pulling off 100 or so feet of line and then it took a slight left detour, brushing up against the clump of mangrove right below where my rod tip is. The fish came off. This fish was my immediate reaction to losing the fish.
It probably would have been my biggest bonefish ever. That tail haunts me.