"Uh... we, uh, give it a wide berth and continue with our mission."
"OK, next you come across a river of unusual size. But no ordinary...."
Anyway, no fault of Aaron's that the (published) adventure was constructed that way. The climax to the adventure was suddenly a thousandfold more interesting, but we had frittered so much time in sightseeing that our hurried plans came to an inevitable end: ignominious deaths (almost) all round.
Aaron tried out d20 on it, and looked to be almost as confused and frustrated as I was when I ran my one Worldprime game. Seeing CoC run by d20 gave some interesting perspective. It seems to me that d20 automatically creates a much more rules-lawyer friendly and story-telling unfriendly atmosphere. It's hard to run cinematic and enjoyable combat/action scenes when twerps are going on about move actions and flanking and opposed grappling checks. C'mon! This is Call of Cthulhu! Do you actually think you can win?!? Just enjoy yourself for fuck's sake!
I swear, as I get older and crotchetier, my own preferred RPG-style looks more and more like Once Upon a Time.
OK, I'm ranting. But I had fun, and hung out with old friends and new friends and ate and gabbed and rolled little polyhedra.