I tore a disc in my back lifting pins as well. It took a few catscans and lots of pain killers and anti-inflammatorys plus 4 months to finally settle down.
I learnt my lesson. I reckon most members would probably have a similar story given our hobby is such a heavy dam hobby.
![Confused ^&^](http://www.aussiepinball.com.au/Smileys/classic/Confus_24.gif)