I had two occurrences were the Unrelenting Force helped me pass a bug in the game. Last bug was with a Moth Priest who was reading an Elder Scroll. He stopped at one point and nothing I did made him continue reading, I tried everything. After i shouted the Unrelenting Force th'um he continued. Thought I'd shared this piece of info. I'm on PS3.

It's renowned for unsticking stuck followers as well. a good shout that has a lot of benefits.

U-Force even solves bugs it seems.