Can the harmonic balance come loose?

RedFish said

Get a impact grade socket and a good long 3/4 pull bar for the balancer bolt. Wedge it in such a way as it cannot move clockwise. Bump the starter. That should break the bolt loose so you can back it out. Pray that the balancer will fall off the crank snout..

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This is an excellent way to break loose the crank bolt,, but be very careful..

The Breaker bar must be firmly against whatever support you're using,, or the whole wrench assemby could fly off quite violently..

I still hpe it's the damper sliding back and forth...