This is one of the things that I quote the most often, and I usually burst out laughing every time:

"Ow!"

Now, you really, really need to understand what the context is. It's said right at the end of the first clip here:
http://www.youtube.com/watch?v=xS2hzBsRSx4

So yes, I say this every time I'm playing a video game or watching a movie or anime and I feel like understating how much something hurts, always a long way after it happened and almost always when fatal. I do remember saying it after getting my head chainsawed off for the first time in Resident Evil 4.