I remember when i played Spiderman 2 for the Gamecube, I was doing the last boss Dr Octopus (Spoilers!).
Anyway, so i was having a hard time of it, as he kept knocking me down with his tentacles anytime i came near him, so i ended up swinging around the room, nipping in and doing some quick damage before running away again. It was a very long, slow process, which was taking ages. I'd been doing it for about 30 mins and had taking barely any health off him.
Then one time i got in too close and he trapped me in a corner, and raised his arms to bitchslap me, which was when i noticed the 'spidey sense' alert thing come up as he did so, something i hadn't noticed before. Quick as a fucking spider, i press the dodge button, and Spidey counters the slap, and counters with a punch of his own; i didn't even realise you could do that! Then I counter another punch, and another, until Dr Oct has little to no health left, before i rise up and kick the crap out of that biotch.
It was amazing, it felt like a movie when the hero is getting beaten, and then goes for one last push when he's trapped in the corner, and rises up and destroys him like the bit in the end of the Matrix.
Awesome.