figbat
Slippery scientist
- Location
- South Oxfordshire, UK
I suspect something was a bit gummed up and the action of removing the cassette has freed it enough to start working again. However it may not be fully-working - not all of the pawls may be engaging and there's the chance it could happen again (with potentially serious consequences to your teeth and/or groin) - definitely worth giving it an oiling. Maybe start with a light oil like WD40 to clean out the old oil/grease, allow to dry, then run some oil into it (assuming you can't or won't be disassembling it).
