I've had fun in the past with removing a freewheel......
Tried and tried with a 12" adjustable spanner on the remover - didn't budge. WD40's the thread side (near the spokes) nothing....
Attached said 12" spanner to a garden rake - rammed the tool into a 'flattened end of the rake (the rake still has a squashed end to this day)........
Tried and tried..........with this new 5 foot lever...nothing...........
Suddenly, it slipped, and I went flying backwards over the drive head over heals.......... Barsteward.......... threw the lot in the garage....
Off to the LBS tomorrow.....
Got up next day, temper having gone........ went out got wheel, oh one last go, the thing was loose............