breaking off the fly

[fishboy2]

i have been thinking about how i lost a expensive deer hair popper while float tubbing. it was a while back but i still remeber it pretty well. here is what happened: i was back trolling about 15 yards of line, mabye a little more. i was popping the fly every few seconds. after about 4 or 5 pops, the big bass came up and took it in one big leap all the way out of the water. i set the hok the only way i couls and that was to lift the rod paralell to th water with a slight angle to it. i get ready for the fight but the fish is not on and my fly had broken off right after or at the knot. any body know why this happened and how i can prevent this in the future? thank you
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