True story.
As best as I could reconstruct it from memory, about 30 years later.
Although in retrospect, we were never in real trouble (providing we didn't panic)we did not know that at the time. We were scared shitless.
Its a story with several morals:
1) Be prepared,
2) Trust your instruments
3) Don't panic.
4) Things have a way of going to pieces when you least expect it.