Just want to plug a tool I've been enjoying.
It's saved me from many difficult situations, and is way improved over the hit-with-hammer version that has scarred me since 1968.
I've used it to release alternator rotor nuts, clutch nuts, those spinning fork rod screws and nuts on various bikes and a seriously frozen axle on my adopted old SV650. With my arthritis, it makes heavier jobs a pleasure. I lack a big compressor so this fills the void and I can skip the breaker bar and hammer nonsense. It's a mere $50!
https://www.harborfreight.com/power-tools/drivers/12-in-heavy-duty-electric-impact-wrench-61173.html