Very cool. I have an eagle/seagull story myself..
Was on a salmon fishing trip on the saltwater off Vancouver island. The guide we were with was using anchovies for bait behind a flasher and running them off downriggers. He'd bait the hook then let off about 30 feet of line before attaching it to the down rigger ball. Well one time when he let the line out, a gull came down, grabbed the anchovy, and got hooked.
The guide clips the line with the attached gull to the down rigger ball, and drops the ball down, taking the gull underwater with it. After submerging the gull for about 30 seconds, he brought it back up, the gull was still alive, but somewhat subdued so the guide was able to bring the gull in and unhook it without having to battle a fully energized and PO'd gull.
Once released the gull just sat on the water flapping its wings and acting somewhat distressed, meanwhile we were back to trolling and moving away from the gull. A bunch of the gulls buddies showed up, and started circling the dazed gull, diving at it and raising a ruckus with their screeching calls. All of a sudden, out of nowhere, an eagle appears and swooped down and grabbed that gull and flew off with it. Truly a bad day for that particular gull.