Huh, it didn't do anything for me, I dodged it on the first jump and caught it mid-flight baseball bat style. The pack of sonic dogs was way worse. And the beaked hydra, with the constant metal drumming, ugh.
The other thing is when it comes over the intercom: Forget about Freeman! Anyone still down there is on there own!
The worldbuilding in Half-life was so good. You weren't a character walking into rooms and enemies would attack you, like Doom and Quake. There was a big event happening, and you were just a part of it.