Driving home on my Nero Corsa V11 (2005) Le Mans, I downshifted into 4th and then couldn't down shift or change gear. However the gear shifter remained "sprung" - and I found (as I was 3 hours ride from home) with some experimentation that I could change gear if I accelerated hard then quickly decelerated, and at the critical moment, I could upshift. Not exactly an easy process, but it got me home. So my question: is this a symptom of broken pawl spring or are there different gremlins at work?