Used to fish sporadically for catfish at the local park. First time I ever caught one, I was so pumped with adrenaline that a battle ensued as I was reeling my game in, I thought he was going to get away and I couldn't let that happen.
So I reeled in with all my might, when the line was in around probably about 5 meters, I yanked the rod back like a palm tree getting pulled by a hurricane. The poor thing flew out of the water, 5 meters high, and landed with a thump like 7 meters on the grass behind me, writhing and wiggling like Chief Wiggums.
I also did do some sea fishing a few times a couple years ago. The bugger I caught was like 3 feet long and weighted around 50lbs. I still have a picture of that somewhere.