I'll guess that it's a matter of survival behavior, but not agression.
Many game fish will "charge the boat" or "run to" to angler, but when you look at it, what they seem to be doing is quite logical. They are going to where there is no tension or opposition (the line). If I put a big hook in your mouth and you ran away to the north and it wasn't working, wouldn't you turn and run to the south, (east and west) hurt pretty bad too when battling a tight line. And, many savy lunkers ..... that's the only time they can spit the hook (on a slack line), and that's when the line is going to snap, under the boat or recovering slack.
Mr. Cudda was probably reacting to a reflection that seemed to be bait on the surface.