The bough creaked and swayed in a nasty fashion, and it didn't do to think of the drop below, but at last I got safely to where I wanted to be.
Thinking about how far I could fall would have been helpful.  
mnli hypothesis: Thinking about how far I could fall would have been helpful.   premise: The bough creaked and swayed in a nasty fashion, and it didn't do to think of the drop below, but at last I got safely to where I wanted to be.