ValveTime.co.uk | Valve News, Forums, Steam

Before HL2 came out one of the promo screenshots (and video footage) was this...

http://www.newscientist.com/data/images/ns/9999/99994238F1.JPG

Now I've finished the game I noticed I never encountered the above situation... did I miss it (I played it on medium) or is it not there.

Dewboy