What happens is you have good weather on both ends of the trip, so if
you encounter clouds en route, you think, well this is just temporary;
I'll duck under and in a few minutes I'll be clear again. Then you
get lower, and lower, and if the visibility is 3 mi in haze the next
thing you know you're in it. After the second time this happened I
immediately started work on the IR. Fortunately, I've never had a
problem trusting my gyros.