I bet you were relieved! Getting locked in an old cemetery sounds like the beginnings of a horror movie. I grew up in a family that really enjoyed horror movies and such. Needless to say, that desensitized me a bit to getting scared.
In fact, i use to thrive in conditions most would find a little scary. So, no i was never afraid in the dark at night to be there alone. However, it did have an ominous ambiance about the location. Not nearly as old and ominous as your cemetery there!
I used to think it helped my creative process considering my artwork was extremely dark back then (and i don't mean in shade and lighting or color ;).
You are very welcome too!