People, it's only a video. Man up.
It's funny though, it was an unconscious response. I guess I wouldn't be fit for the surgical profession.
I also have this physical reaction. Mentally, I don't mind it and I can watch for a good 30 seconds until something subconcious kicks in and I get really sick for some reason.
On that note, I had to take breaks to watch all of the first Hellraiser even though it was cheesy as fuck. xD